Section 179.103-2 - Manway cover(a) The manway cover must be an approved design.(b) If no valves or measuring and sampling devices are mounted on manway cover, no protective housing is required.29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 179-50, 60 FR 49077, Sept. 21, 1995