|(a) Licensees shall have a preventive maintenance program in place which includes a schedule of written procedures for regular testing and inspection of facility systems and equipment. (b) Components and their related support systems shall be maintained in a condition that is compatible with their operation or safety purpose by repair, replacement, or other means. (c) If a safety device is taken out of service for maintenance, the component served by the device shall also be taken out of service unless the same safety function is provided by an alternate means. (d) If the inadvertent operation of a component taken out of service could cause a hazardous condition, that component shall have a weather-resistant tag attached to the controls with the words, "DO NOT OPERATE," or similar notice. (e) The operations supervisor shall retain permanent records of dates and maintenance activities performed. (f) Welding, cutting, and similar operations shall be prohibited within 25 feet of the container and the transfer area during transfer operations and shall be conducted only as specifically authorized in a manner to prevent accidental ignition of LNG or flammable fluids.