delivered the opinion of the Court.
The issue in these cases is whether the New York Unemployment Insurance tax may be collected from employers of certain employees engaged in maritime employment on the wages of those employees. The New York Act levies a payroll tax on all employers of four or more persons, with exceptions not here material, and the sum thus collected is paid into a general fund for the benefit of all unemployed persons covered. 1 The employee in 722 is an assistant cook on a dredge, and the employee in 723 is a grain worker on a floating elevator. The vessels on which both employees served were engaged primarily on work in the waters of the state of New York during the tax period. The appellants challenge the validity of the statute as applied on two grounds: (1) imposition of the tax on maritime employees violates Article 3, § 2 of the Constitution, which gives federal courts exclusive admiralty jurisdiction; (2) Congress has declared either expressly or by implication that no such tax shall be imposed on maritime employers. No other questions of jurisdiction to tax are before us. The New York Court of Appeals *308 overruled both these contentions 2 and the cases are here on appeal under § 237 (a) of the Judicial Code.
In approaching this problem, we may put aside two questions at the beginning. It is contended that these two employees are not “members of a crew” and hence are outside the scope both of admiralty jurisdiction and of the relevant statutes.
3
In the view we take, it is immaterial whether or not the employees are crew members. We also need not consider whether these taxes affect interstate or foreign commerce, since Congress has expressly provided that a state shall not be prohibited from levying the tax because the employer is engaged in interstate or foreign commerce, 26 U. S. C. 1600;
Perkins
v.
Pennsylvania,
That the state is vested with power to impose taxes in general upon employers to alleviate unemployment, and that the authority of the state is in no wise impaired by reason of blending the imposition of a tax with the relief of unemployment has already been decided by this Court.
Carmichael
v.
Southern Coal Co.,
Granting that the federal government might choose to operate its own uniform unemployment insurance system for maritime workers if it chose,
6
“Uniformity is required only when the essential features of an exclusive federal jurisdiction are involved.”
Just
v.
Chambers,
The second contention is that the federal Act precludes coverage of these employers by the state. Title 9 of the Federal Social Security Act (26 U. S. C. §§ 1600-11) taxes employers of eight or more employees but provides for a 90% credit against this federal tax for payments made into a state unemployment fund approved by the federal government. 26 U. S. C. §1607 exempts from this federal tax certain types of employers of persons including those employed “as an officer or member of the crew of a vessel on the navigable waters of the United States.” We do not believe that the exemption of these employers from the federal Act can operate to exempt them from state unemployment insurance taxes. The federal Act, from the nature of its ninety per cent credit device, is obviously an invitation to the states to enter the field of unemployment insurance,
Buckstaff Bath House Co.
v.
McKinley,
Employers of martime workers, otherwise subject to state unemployment insurance taxing acts, are not excluded from the coverage of such acts either by Article 3, § 2 of the Constitution, or by Congressional enactments.
Affirmed.
Notes
For a description of the New York act, see
Chamberlain, Inc.
v.
Andrews,
The employees here, because of the nature of their work, are arguably not within the scope of that portion of admiralty jurisdiction which has been said to be necessarily exclusive. Cf. Davis v. Department of Labor, 317 U. S. 249. On the other hand, certain decisions of the Bureau of Internal Revenue .might provide the basis for contention that these employees are “members of a crew” within the meaning of the federal act. As to whether a dredge is a vessel, see S. S. T. 78, C. B. 1937-1, 408; as to whether a floating grain elevator is a vessel and whether a grain processor is a member of a crew, see S. S. T. 204, C. B. 1937-2, 427; S. S. T. 210, C. B. 1937-2, 429.
Counsel refers us to
Gibbons
v.
Ogden,
Just
v.
Chambers,
Cf. 46 U. S. C. § 688 (the Jones Act, dealing with recovery for injuries by seamen); 33 U. S. C. §§ 901-950 (the Longshoremen’s and Harborworkers’ Act dealing with recovery for injuries by longshoremen and harborworkers).
Southern Pacific Co.
v.
Kentucky,
The provision exempting officers and members of crews from the federal unemployment insurance tax are similar to those in Titles II and VIII of the Social Security Act, dealing with the old age retirement *311 pensions. Cf. 53 Stat. 1384, repealing the exemption as to certain maritime workers for old age retirement purposes. The report of the Ways and Means Committee of the House of Representatives on the original Act indicates that the exception was based on the anticipation of administrative difficulties. House Report 615, 74th Cong., 1st Sess., 33. There was also some fear of possible constitutional objection to state coverage of maritime employees. See statements of Rep. Vinson and Rep. McCormack, 79 Cong. Rec. 5903.
