29 C.F.R. § 570.110
(b) If, in the light of the statements in paragraph (a) of this section, the minor cannot be considered as employed in the establishment, he may, nevertherless, be employed “about” it if he performs his occupational duties sufficiently close in proximity to the actual place of production to fall within the commonly understood meaning of the term “about.” This would be true in a situation where the foregoing proximity test is met and the occupation of the minor is directly related to the activities carried on in the producing establishment, in this connection, occupations are considered sufficiently related to the activities carried on in the producing establishment to meet the second test above at least where the requisite relationship to production of goods exists within the meaning of section 3(j) of the Act. 20 By way of example, a driver's helper employed to assist in the distribution of the products of a bottling company who regularly boards the delivery truck immediately outside the premises of the bottling plant is considered employed “in or about” such establishment, without regard to whether he ever enters the plant itself. On the other hand, employees working entirely within one establishment are not considered to be employed “in or about” a wholly different establishment occupying separate premises and operated by another employer. This would be true even though the two establishments are contiguous. But in other situations the distance between the producing establishment and the minor's place of employment may be a decisive factor. Thus, a minor employed in clearing rights-of-way for power lines many miles away from the power plant cannot well be said to be employed “in or about” such establishment. In view of the great variety of establishments and employments, however, no hard and fast rule can be laid down which will once and for all distinguish between employments that are “about” an establishment and those that are not. Therefore, each case must be determined on its own merits. In determining whether a particular employment is “about” an establishment, consideration of the following factors should prove helpful:
20 See part 776 (bulletin on coverage of the wage and hours provisions) of this title.