46 CFR § 58.60-5
Industrial systems: Locations
April 15, 2021
An industrial system under this subpart must not be in a space that is—
(a) Concealed; or
(b) Inaccessible to industrial personnel.
An industrial system under this subpart must not be in a space that is—
(a) Concealed; or
(b) Inaccessible to industrial personnel.