Within 90 days after the date on which the Commission adopts relevant technical standards based on recommendations of the Commercial Mobile Service Alert Advisory Committee, established pursuant to section
1202
(a) of this title, the Commission shall complete a proceeding to require licensees and permittees of noncommercial educational broadcast stations or public broadcast stations (as those terms are defined in section
397
(6) of this title) to install necessary equipment and technologies on, or as part of, any broadcast television digital signal transmitter to enable the distribution of geographically targeted alerts by commercial mobile service providers that have elected to transmit emergency alerts under this section.