sentences:  In 1947, Congress enacted the Portal to Portal Act of 1947 to amend the Fair Labor Standards Act in light of the court's ruling in "Anderson v. Mt Clemens Pottery Co." The word "portal" refers to the workplace door, so "Portal-to-Portal" could be interpreted to mean that all time spent within that door is work time.However, Section 4 of the 1947 Act required that the determination of whether time spent in preliminary or postliminary activities was "work" under the FLSA was to be based solely on contract, custom, or practice.Unfortunately, the Portal-to-Portal Act was equally unclear as to what constituted contract, custom or practice.