delivered the opinion of the Court.
After argument, we affirmed by per curiam order the decree of the Circuit Court for Anne Arundel County which enjoined the appellant from refusing to any person the accommodations of the restaurant owned and operated by him in the City of Annapolis on account of race, color, creed or national origin. The injunction was issued pursuant to the provisions of Code (1964 Supp.), Article 49B, Sections 11 and 12 — the 1963 public accommodations law. In affirming the decree, we held that law to be in effect and constitutional. The reasons for our order follow.
This action was brought upon a complaint lodged against the appellant by the Commission on Interracial Problems and Relations under the 1963 public accommodations law. The complainant was a Negro whom the appellant had refused to serve in his restaurant because of the complainant’s race. The appellant elected to have the complaint submitted directly to the Circuit Court for Anne Arundel County rather than to have it heard by the Commission in the first instance. He admits the discrimination, but contends that the law was suspended by petitions for a referendum, and that the Secretary of State acted illegally in refusing to give effect to the petitions. The appellant argues that the statutory provisions pertaining to requirements with respect to signatures for a referendum are in conflict with the provisions of the Maryland Constitution; that the Secretary of State did not have the power or authority to decline to accept referendum petitions against the public accommodations law on the ground of the invalidity of some of the signatures and should have referred the petitions to the elec *568 torate; and that therefore the public accommodations law has never gone into effect. He also contends that the provisions of that law are in violation of the Involuntary Servitude provision of the Thirteenth Amendment and of the Privileges and Immunities and Due Process clauses of the Fourteenth Amendment of the Constitution of the United States.
The State contests the right of the appellant in these proceedings to challenge the legality of the Secretary’s refusal to place the public accommodations law on the ballot. It urges that the only proper manner in which this question could have been raised was by a mandamus action, rather than by a collateral attack in enforcement proceedings. The State also contends that any right the appellant might have to contest the Secretary’s action is barred by laches. We do not decide these questions, for, in our opinion, even assuming the appellant has the right to contest the Secretary of State’s action, his contentions with respect to both the Maryland and Federal Constitutional provisions are without merit.
I
Article XVI of the Maryland Constitution reserves to the people the power of referendum, to approve or reject at the polls any Act of the General Assembly if approved by the Governor or if passed over the Governor’s veto. 1 Section P(b) reads as follows:
“(b) The provisions of this Article shall be self-executing; provided that additional legislation in furtherance thereof and not in conflict therewith may be enacted.”
Section 2 provides that if a referendum petition is filed with the Secretary of State, “the same shall be referred” by him to a vote of the people at the next ensuing election. Section 3 deals with the number of signers necessary for a referendum petition, and for extending the time for filing the petition for thirty days if more than one-half the requisite number of signatures required are appended before the first day of June. Section 4 reads as follows:
*569 “A petition may consist of several papers, but each paper shall contain the full text of the Act or part of Act petitioned upon; and there shall be attached to each such paper an affidavit of the person procuring the signatures thereon that of the said person’s own personal knowledge every signature thereon is genuine and bona fide, and that the signers are registered voters of the State of Maryland, and of the City of Baltimore, or County, as the case may be, as set opposite their names, and no other verification shall be required.”
The statutory provisions in respect of signatures to referendum petitions are contained in Section 169 of Article 33 of the Code (1964 Supp.). This Section was originally enacted in 1941 (Chapter 335, § 315A), and was re-enacted in 1957, with some changes not here material. In 1962, the section was amended to read as follows:
“In every petition (including an associated or related set of petitions) under the provisions of Article XVI of the State Constitution, there shall be appended to the signature of each signer his residence, the precinct or district wherein he is registered as a voter, and immediately below the signature of any such signer, there shall be either printed or typed, the name of such signer.” Code (1964 Supp.).
The amendment added the phrase in parentheses; otherwise the provisions of the 1957 law were re-enacted without change. The 1962 session of the General Assembly added Sections 169A to E, inclusive. Sections 169A and B make it unlawful to obtain signatures by misrepresentation or knowingly to circulate false statements or representations concerning the contents or purpose of a petition to obtain any signature thereto. Section 169B-(e) makes it unlawful “[t]o give, pay, or receive any money or other valuable consideration or inducement for signing the petition or for securing signatures thereon”; and Section 169C provides for the filing of statements of contributions and expenditures with the petition. Section 169D states that any ques *570 tion concerning the invalidity of the signature of any person affects that signature only. Section 169E provides that offenses under the preceding sections shall be punishable as an offense under the election laws and, if the offense warrants, .shall also be punishable under the laws concerning perjury.
The public accommodations law was enacted by Chapters 227 and 228 of the 1963 session of the Legislature. 2 Prior to June 1, 1963, the date on which that law was to become effective, referendum petitions were filed to place both chapters of the law to a vote at the next general election. The Secretary of State examined the petitions, and in doing so applied the standards and requirements of both Section 4 of Article XVI of the Maryland Constitution and Section 169 of Article 33 of the Code. The Secretary rejected a number of signatures which left the first half of each referendum petition short of the required number, and refused to place the 1963 law on the ballot. If the Secretary had applied only the Constitutional limitations and not those contained in Section 169, each petition, upon its face, would have sufficed.
If the requirements of Section 169 of Article 33 relating to the form of signatures contained in referendum petitions are valid, the referendum petitions were insufficient to suspend the law and refer the bills. If the provisions of Section 169 of Article 33 are inconsistent with the provisions of the Maryland Constitution and therefore invalid, the law should have been referred.
The only provision of Section 4 of Article XVI of the Maryland Constitution as to the form of the petition is that it may consist of several papers, each of which shall contain the full text of the Act or part of the Act petitioned upon. The requirement of an affidavit from the person procuring the signatures does not go to the form of the petition to which the affidavit is to be attached. In
Sun Cab Co. v. Cloud,
“Each form of petition signed must contain the affidavit of the person procuring the signature, that of his own personal knowledge each signature is genuine and bona fide, and that the signers are registered voters of the State, and of the city or county, as the case may be, set opposite their respective names. How it shall be ascertained whether these constitutional requirements have been met by petitions filed, the referendum article has not prescribed.”162 Md. at 422 .
The present section adds three requirements to the form of the petition. The residence of each signer and the precinct or district wherein he is registered as a voter must be appended to his signature, and below his signature his name must be either printed or typed.
These statutory requirements pertain only to the identification of the signer. They do not affect the Constitutional provision with respect to the affidavit of the person who procured the signatures, except insofar as they may provide means of checking the truth of the affidavit. They do not require further affidavits. Section 4 of the Constitutional provision “that no other verification shall be required” must be taken in conjunction with the provisions of Section 1(b). Clearly, the provisions of the Article will be furthered if, by proper and reasonable means, a referendum petition is to be put upon the ballot only if it has the requisite number of genuine signatures of registered voters. We hold that the statutory provisions are not in conflict with Section 4 of Article XVI of the Constitution. We hold, further, that these provisions are reasonable and constitute proper legislative enactments in furtherance of and not in conflict with the purposes of the Article.
The requirements that the residence of each signer and the precinct or district in which he is a registered voter must be appended to his signature are only proper means to endeavor to assure that the provisions of the Constitution as to who may sign referendum petitions are met. They safeguard the privilege which the Constitution grants. They facilitate checking of
*572
the petitions by interested persons to ensure that only qualified persons have signed. Similar provisions have been upheld as reasonable in other jurisdictions.
Shields v. Wells,
65 S. D. 552,
The requirement that the name of the signer is to be printed or typed below his signature falls within the same category. We take judicial notice of the fact that many signatures are illegible. The Legislature has enacted a similar provision with respect to the recording of deeds and other legal instruments. Code (1957) Article 17, Section 52.
In a comprehensive opinion in the Baltimore City Court, Judge Tucker upheld as reasonable and constitutional the statutory provisions here involved, as well as other provisions in the law then in effect which required the appending of the signer’s occupation and place of business. Reddick v. State, reported in 42 Ops. Att’y Gen. 495 (1958). As to the requirement that the signer’s name be printed or typed on the petition, Judge Tucker said:
“Then, there is the provision that the signer’s name shall be printed or typed on the petition. The purpose of that is, probably, because the handwriting of a lot of people who sign a petition is really illegible. It is not going to help the Secretary of State to find out whether a particular person is’ a registered voter if he does not know his name. I have glanced over some of these petitions, and some of the signers wrote their names very legibly. There are others which are difficult, if not impossible, to decipher; and this requirement has a good purpose.”
In
State, ex rel. Ayres v. Amsberry,
The appellant also contends that Section 169B(e) of Article 33, making it unlawful to give or receive money or other consideration for signing a petition or securing signatures is an unlawful restriction of the people’s right to a referendum; that Chapter 43 of the 1962 Laws containing this provision and the other provisions as to referendum petitions has no severability clause, and therefore this entire Chapter is inoperative; and that, for these reasons, the action of the Secretary of State in refusing to put the referendum on the ballot was illegal and the operation of the public accommodations law is still suspended. We disagree with his conclusion and with each of the postulates upon which it is based.
Sections 169A to E, inclusive, are not requirements as to the sufficiency of referendum petitions but only collateral measures to prevent fraud, similar to the corrupt practices provisions in connection with the election laws to which they refer. See Pettengill,
Regulation of Campaign Finance
— The
Maryland Experience,
19 Md. L. Rev. 91 (1959). The appellant has proffered no argument or authority to overcome the presumption of the constitutionality of Sections 169A through E,
3
except as to Section 1690. The appellant cites
State, ex rel. v. Snell,
The appellant argues that even if Section 169 of Article 33 is constitutional, its requirements in respect of the contents of referendum petitions are merely directory and not mandatory, so that the ruling of the Secretary of State that there were an insufficient number of valid signatures on the referendum petitions was nugatory. Section 169 provides that each signature on a referendum petition “shall” (not “may”) be supported by a statement of the signer’s residence and voting precinct or district and by his name in print or type. The use of the words “shall” or “may” is not controlling in determining whether a particular provision is mandatory or directory; the question of construction turns upon the intention of the Legislature as gathered from the nature of the subject matter and the purposes of the legislation.
Hitchins v. City of Cumberland,
The appellant further contends that, even if there were an insufficient number of valid signatures on the referendum petitions and the Secretary of State so found, the filing of the petition of itself suspended the law, unless and until it was judicially determined that the valid signatures on the petitions were insufficient. To support his argument, he relies upon a phrase in the opinion in
First Continental v. Director,
II
The public accommodations law is a valid exercise of the police power of the State and does not violate any of the appellant’s rights under the Privileges and Immunities and Due Process clauses of the Fourteenth Amendment. The law prohibits discrimination because of race, creed, color or national origin of any person by the owner or operator of a place of public accommodation. A place of public accommodation is defined to mean any hotel, restaurant, inn, motel or an establishment regularly engaged in the business of providing sleeping accommodations or serving food or both for a consideration, and which is open to the general public, with certain exceptions as to places or portions of premises primarily devoted to the sale of alcoholic beverages. The appellant concedes, as under the authorities he must, that at common law, inns and common carriers were under a duty not to discriminate. What the Legislature has done in the public accommodations law is to extend that duty to carefully limited places of public accommodations which, while not public utilities, like them, are open to the gen
*577
eral public for the supplying of necessities. Such an extension is within the legislative discretion, under the police power, to determine what measures are necessary or appropriate for the protection of the health, morals or welfare of the people. The courts will not interfere with the exercise of that power, if the regulation is not arbitrary, oppressive or unreasonable, even though its exercise may inconvenience individual citizens. See
Davis v. State,
Anti-discrimination laws similar to or even broader than the Maryland public accommodations law have been generally sustained as a proper exercise of the police power.
Marshall v. Kansas City,
Maryland’s right to pass the public accommodations law is not contravened by the Fourteenth Amendment.
Marshall v. Kansas City, supra; Pickett v. Kuchan, supra; People v. King,
“Elaborately to argue against this contention is to dignify a claim devoid of constitutional substance. Of course a State may leave abstention from such discriminations to the conscience of individuals. On the other hand, a State may choose to put its authority behind one of the cherished aims of American feeling by forbidding indulgence in racial or religious prejudice *578 to another’s hurt. To use the Fourteenth Amendment as a sword against such State power would stultify that Amendment. Certainly the insistence by individuals on their private prejudices as to race, color or creed, in relations like those now before us, ought not to have a higher constitutional sanction than the determination of a State to extend the area of nondiscrimination beyond that which the Constitution itself exacts.”326 U. S. at 98 .
The appellant argues that the public accommodations law is unconstitutional because restaurants do not enjoy a monopoly. This argument goes only to whether or not the Thirteenth and Fourteenth Amendments of themselves prohibit discrimination. That question is not before us. We hold only that the public accommodations law is a valid exercise of the State’s police power and that the law is not in violation of the Federal Constitution.
The appellant’s argument that the law is invalid under the Thirteenth Amendment is equally unsubstantial. The restriction placed upon the conduct of his business is not involuntary servitude under the meaning of that Amendment. See
United States v. Petrillo,
Notes
. For the extent of the adoption of the referendum, see note, 43 Harv. L. Rev. 813 (1930).
. The 1963 Act applies only to Baltimore City and some of the counties. In 1964, the public accommodations law was made State-wide. The 1964 Act was approved in a referendum vote on November 3, 1964.
. On the constitutionality of corrupt practices acts in general, see Ann.
We do not decide the constitutionality of a criminal statute in advance of its application to a particular person claimed to be injured and without reference to the precise facts to which it is to be applied.
Hammond v. Lancaster,
