I will have to see on the FCC website, but I think translators, required to ID once per hour either by the mothership or the station itself and it can be automatic. Think UNC and their translators in western NC.
I bet the transmitter is old and the frequency has drifted and of course no one looks after it so it wanders all over the place and no one cares and of course no one worries about things like on frequency operation and station ID's; just that it is on the air. Good thing it is only licensed for 10 watts.
edit-Here is the wording from the FCC website and this all I can find that states anything about station identification:
Sec. 73.1201 Station identification.
(a) When regularly required. Broadcast station identification
announcements shall be made:
(1) At the beginning and ending of each time of operation, and
(2) Hourly, as close to the hour as feasible, at a natural break in
program offerings. Television and Class A television broadcast stations
may make these announcements visually or aurally.
(3) Satellite operation. When programming of a broadcast station is
rebroadcast simultaneously over the facilities of a satellite station,
the originating station may make identification announcements for the
satellite station for periods of such simultaneous operation.
(ii) In the case of aural broadcast stations, such announcements, in
addition to the information required by paragraph (b)(1) of this
section, shall include the frequency on which each station is operating.