Sec. 80.106  Intercommunication in the mobile service.

    (a) Each public coast station must exchange radio communications 
with any ship or aircraft station at sea; and each station on shipboard 
or aircraft at sea must exchange radio communications with any other 
station on shipboard or aircraft at sea or with any public coast 
station.
    (b) Each public coast station must acknowledge and receive all 
communications from mobile stations directed to it, transmit all 
communications delivered to it which are directed to mobile stations 
within range in accordance with their tariffs. Discrimination in service 
is prohibited.