Not later than 18 months after the date of enactment of this Act, the Commission shall initiate a rulemaking to consider establishing a process under which the Commission shall maintain a list of numbers that are not eligible to be blocked by a voice service provider, which may include a number used—
(1)
for outgoing calls by a public safety answering point or a similar facility that is designated to originate or route emergency calls;
(2)
to originate calls from a government entity, such as a call generated during an emergency;
(3)
by a school, or a similar institution, to provide school-related notifications, such as a notification regarding—
(A)
a weather-related closure; or
(B)
the existence of an emergency affecting a school or students attending a school; and
(4)
for similar or emergency purposes, as determined appropriate by the Commission.