delivered the opinion of the Court.
Local 761 of the International Union of Electrical, Radio and Machine Workers, AFL-CIO, was charged with a violation of § 8 (b) (4) (A) of the National Labor Relations Act, as amended by the Taft-Hartley Act, 61 Stat. 136, 141, upon the following facts.
General Electric Corporation operates a plant outside of Louisville, Kentucky, where it manufactures washers, dryers, and other electrical household appliances. The square-shaped, thousand-acre, unfenced plant is known as Appliance Park. A large drainage ditch makes ingress and egress impossible except over five roadways across culverts, designated as gates.
Since 1954, General Electric sought to confine the employees of independent • contractors, described hereafter, who work on the premises of the Park, to the use of Gate 3-A and confine its use to them. The undisputed reason for doing so was to insulate General Electric employees from the frequent labor disputes in which the contractors were involved. Gate 3-A is 550 feet away from the nearest entrance available for General Electric employees, suppliers, and deliverymen. Although anyone can pass the gate without challenge,
1
the
The independent contractors are utilized for a great variety of tasks on the Appliance Park premises. Some do construction work on new buildings; some install and repair ventilating and heating equipment; some engage in retooling and rearranging operations necessary to the manufacture of new models; others do “general maintenance work.” These services are contracted to outside employers either because the company’s employees lack the necessary skill or manpower, or because the work can be done more economically by independent contractors. The latter reason determined the contracting of maintenance work for which the Central Maintenance department of the company bid competitively with the contractors. While some of the work done by these contractors had on occasion been previously performed by Central Maintenance, the findings do not disclose the number of employees of independent contractors who were performing these routine maintenance services, as compared with those who were doing specialized work of a capital-improvement nature.
The Union, petitioner here, is the certified bargaining representative for the production and maintenance workers who constitute approximately 7,600 of the 10,500 employees of General Electric at Appliance Park. On
Neither the legality of the strike or of the picketing at any of the gates except 3-A nor the peaceful nature of the picketing is in dispute. The sole claim is that the picketing before the gate exclusively used by employees of independent contractors was conduct proscribed by §8 (b)(4)(A).
The Trial Examiner recommended that the Board dismiss the eomplaint. He concluded that the limitations on picketing which the Board had prescribed in so-called “common situs” cases were not applicable to the situation before him, in that the picketing at Gate 3-A represented traditional primary action which necessarily had a secondary effect of inconveniencing those who did business with the struck employer. He reasoned that if a primary employer could limit the area of picketing around his own premises by constructing a separate gate for employees of independent contractors, such a device could also be used to isolate employees of his suppliers and customers, and that such action could not relevantly be distinguished from oral appeals made to secondary employees not to cross a picket line where only a single gate existed.
The Board rejected the Trial Examiner’s conclusion, 123 N. L. R. B. 1547. It held that, since only the employees of the independent contractors were allowed to use Gate 3-A, the Union’s object in picketing there was
The Court of Appeals for the District of Columbia granted enforcement of the Board's order, 107 U. S. App. D. C. 402,
I.
Section 8 (b) (4) (A) of the National Labor Relations Act provides that it shall be an unfair labor practice for a labor organization
“. . . to engage in, or to induce or encourage the employees of any employer to engage in, a strike or a concerted refusal in the course of their employment to use, manufacture, process, transport, or otherwise handle or work on any goods, articles,materials, or commodities or to perform any services, where an object thereof is: (A) forcing or requiring . . . any employer or other person ... to cease doing business with any other person. . . .”
This provision could not be literally construed; otherwise it would ban most strikes historically considered to be lawful, so-called primary activity. “While § 8 (b) (4) does not expressly mention ‘primary’ or ‘secondary’ disputes, strikes or boycotts, that section often is referred to in the Act’s legislative history as one of the Act’s ‘secondary boycott sections.’ ”
Labor Board
v.
Denver Building Council,
But not all so-called secondary boycotts were outlawed in § 8 (b)(4)(A). “The section does not speak generally of secondary boycotts. It describes and condemns specific union conduct directed to specific objectives. . . .
Important as is the distinction between legitimate “primary activity” and banned “secondary activity,” it does not present a glaringly bright line. The objectives of any picketing include a desire to influence others from withholding from the employer their services or trade. See
Sailors’ Union of the Pacific (Moore Dry Dock),
92 N. L. R. B. 547. “[I]ntended or not, sought for or not, aimed for or not, employees of neutral employers do take action sympathetic with strikers and do put pressure on their own employers.”
Seafarers International Union
v.
Labor Board,
However difficult the drawing of lines more nice than obvious, the statute compels the task. Accordingly, the Board and the courts have attempted to devise reasonable criteria drawing heavily upon the means to which a union resorts in promoting its cause. Although “[n]o rigid rule which would make ... [a] few factors conclusive is contained in or deducible from the statute,”
Sales Drivers
v.
Labor Board,
The nature of the problem, as revealed by unfolding variant situations, inevitably involves an evolutionary process for its rational response, not a quick, definitive formula as a comprehensive answer. And so, it is not surprising that the Board has more or less felt its way during the fourteen years in which it has had to apply § 8 (b) (4) (A), and has modified and reformed its standards on the basis of accumulating experience. “One of the purposes which lead to the creation of such boards is to have decisions based upon evidential facts under the particular statute made by experienced officials with an adequate appreciation of the complexities of the subject which is entrusted to their administration.”
Republic Aviation Corp.
v.
Labor Board,
II.
The early decisions of the Board following the TaftHartley amendments involved activity which took place around the secondary employer’s premises. For example, in
Wadsworth Building Co., supra,
the union set up a picket line around the situs of a builder who had eon
“A strike, by its very nature, inconveniences those who customarily do business with the struck employer. Moreover, any accompanying picketing of the employer’s premises is necessarily designed to induce and encourage third persons to cease doing business with the picketed employer. It does not follow, however, that such picketing is therefore proscribed by Section 8 (b) (4) (A) of the Act.” 84 N. L. R. B., at 318.
See also Newspaper & Mail Deliverers’ Union (Interborough News Co.), 90 N. L. R. B. 2135; International Brotherhood of Teamsters (Di Giorgio Wine Co.), 87 N. L. R. B. 720; International Brotherhood of Teamsters (Rice Milling Co.), 84 N. L. R. B. 360.
“When picketing is wholly at the premises of the employer with whom the union is engaged in a labor dispute, it cannot be called ‘secondary’ even though, as is virtually always the case, an object of the picketing is to dissuade all persons from entering such premises for business reasons. It makes no difference whether 1 or 100 other employees wish to enter the premises. It follows in this case that the picketing of Bucyrus premises, which was primary because in support of a labor dispute with Bucyrus, did not lose its character and become ‘secondary’ at the so-called Ryan gate because Ryan employees were the only persons regularly entering Bucyrus premises at that gate.” 85 N. L. R. B., at 418. See also General Teamsters (Crump, Inc.), 112 N. L. R. B. 311.
Thus, the Board eliminated picketing which took place around the situs of the primary employer — regardless of the special circumstances involved — from being held invalid secondary activity under §8 (b)(4)(A).
However, the impact of the new situations made the Board conscious of the complexity of the problem by reason of the protean forms in which it appeared. This became clear in the “common situs” cases — situations where two employers were performing separate tasks on
In
Local 55
(PBM), 108 N. L. R. B. 363, the Board for the first time applied the
Dry Dock
test, although the picketing occurred at premises owned by the primary employer. There, an insurance company owned a tract of land that it was developing, and also served as the general contractor. A neutral subcontractor was also doing work at the site. The union, engaged in a strike against the insurance company, picketed the entire premises, characterizing the entire job as unfair, and the employees of the subcontractor walked off. The Court of Appeals for the Tenth Circuit enforced the Board’s order which found the picketing to be illegal on the ground that the picket signs did not measure up to the
Dry Dock
standard that they clearly disclose that the picketing was directed against the struck employer only.
The Board’s application of the
Dry Dock
standards to picketing at the premises of the struck employer was made more explicit in
Retail Fruit & Vegetable Clerks (Crystal Palace Market),
116 N. L. R. B. 856. The owner of a large common market operated some of the shops within, and leased out others to independent sellers. The union, although given permission to picket the owner’s individual stands, chose to picket outside the entire market. The Board held that this action was violative of § 8 (b) (4) (A) in that the union did not attempt to minimize the effect of its picketing, as required in a commonsitus case, on the operations of the neutral employers utilizing the market. “We believe . . . that the foregoing
In rejecting the ownership test in situations where two employers were performing work upon a common site, the Board was naturally guided by this Court’s opinion in
Rice Milling,
in which we indicated that the location of the picketing at the primary employer’s premises was “not necessarily conclusive” of its legality.
From this necessary survey of the course of the Board’s treatment of our problem, the precise nature of the issue before us emerges. With due regard to the relation between the Board’s function and the scope of judicial review of its rulings, the question is whether the Board may apply the
Dry Dock
criteria so as to make unlawful picketing at a gate utilized exclusively by employees of independent contractors who work on the struck employer’s premises. The effect of such a holding would not bar the union from picketing at all gates used by the employees, suppliers, and customers of the struck employer. Of course an employer may not, by removing all his employees from the situs of the strike, bar the union from publicizing its cause, see
Local 618
v.
Labor Board,
The Union claims that, if the Board’s ruling is upheld, employers will be free to erect separate gates for deliveries, customers, and replacement workers which will be immunized from picketing. This fear is baseless. The key to the problem is found in the type of work that is being performed by those who use the separate gate. It is significant that the Board has since applied its rationale, first stated in the present case, only to situations' where the independent workers were performing tasks unconnected to the normal operations of the struck employer — usually construction work on his buildings.
5
In such situations, the indicated limitations on picketing activity respect the balance of competing interests that Congress has required the Board to enforce. On the other
In a case similar to the one now before us, the Court of Appeals for the Second Circuit sustained the Board in its application of § 8 (b) (4) (A) to a separate-gate situation. “There must be a separate gate marked and set apart from other gates; the work done by the men who use the gate must be unrelated to the normal operations of the employer and the work must be of a kind that would not, if done when the plant were engaged in its regular operations, necessitate curtailing those operations.”
United Steelworkers
v.
Labor Board,
IV.
The foregoing course of reasoning would require that the judgment below sustaining the Board’s order be affirmed but for one consideration, even though this con
Reversed.
I did not vote to grant certiorari in this case because it seemed to me that the problem presented was in the keeping of the Courts of Appeals within the meaning of
Universal Camera Corp.
v.
Labor Board,
Notes
During the strike in question a guard was stationed at the gate.
Member Fanning concurred in the result, reasoning that the common-situs criteria set out by the Board in Sailors’ Union of the Pacific (Moore Dry Dock), 92 N. L. R. B. 547, could be applied to situations where the primary employer owned the premises, and that the requirement that the picketing take place reasonably close to the situs of the labor dispute had therefore been violated by the picketing around Gate 3-A.
See also
Labor Board
v.
General Drivers, Local 968,
The Dry Dock criteria had perhaps their widest application in the trucking industry. There, unions on strike against truckers often staged picketing demonstrations at the places of pickup and delivery. Compare International Brotherhood of Teamsters (Schultz Refrigerated Service, Inc.), 87 N. L. R. B. 502, with International Brotherhood of Teamsters (Sterling Beverages, Inc.), 90 N. L. R. B. 401.
United Steelworkers (Phelps Lodge Refining Corp.), 126 N. L. R. B. 1367; International Chemical Workers Union (Virginia-Carolina Chemical Corp.), 126 N. L. R. B. 905; see Union de Trabajadores (Gonzales Chemical Industries, Inc.), 128 N. L. R. B. No. 116.
