(a) Each terminal shall have a means that enables continuous two-way voice communication between the TPIC and the VPIC.

(b) The means required by subsection (a) of this section shall be usable and effective in all phases of the transfer operation and all conditions of weather at the terminal.

(c) A terminal may use the voice communications system for emergency shutdown specified in Section 2380, subsection (h)(6)(B), to meet the requirement of subsection (a) of this section.

(d) An alternate continuous two-way voice communication system shall be available in the event that the primary communications system is disabled.

(e) Portable radio devices used in compliance with this section shall be intrinsically safe, as defined in the Institute of Electrical and Electronics Engineers Standard Dictionary, 1984 edition, published by the Institute of Electrical and Electronics Engineers, available from the American Society of Mechanical Engineers, 22 Law Drive, Box 2300, Fairfield, New Jersey, and meet Class I, Division I, Group D requirements as defined in the National Electric Code, Article 500, 1996 edition, published by NFPA, 1 Batterymarch Park, P.O. Box 9101, Quincy, Massachusetts 02269-9101.

(f) The means of communication shall be continuously manned during a transfer operation by a person or persons who can immediately contact the TPIC and VPIC.

(g) If the means of communications has not been used within a period of 60 minutes during a transfer operation, the means of communications shall be checked to ensure that it is operative.