the rules issued under subsection (a) shall require that, if a provider approved to provide emergency connectivity service to such area under such rules chooses to provide emergency connectivity service to such area, such provider shall provide both services described in subsection (i)(5)(B) to such area. (f) Limitation of liability (1) Transmission of alert messages Section 602(e)(1) of the Warning, Alert, and Response Network Act ( 47 U.S.C. 1201(e)(1) ) shall apply to a provider of emergency connectivity service (including its officers, directors, employees, vendors, and agents) with respect to the provision of such service (to the extent such service consists of the provision of the service described in subsection (i)(5)(B)(i) of this section) in accordance with the rules issued under subsection (a) of this section, as if such provider were a provider of commercial mobile service that transmits emergency alerts and meets its obligations under such Act. (2) Provision of 9–1–1 service (A) In general Section 4 of the Wireless Communications and Public Safety Act of 1999 ( 47 U.S.C. 615a ) is amended— (i) in subsection (a)— (I) by inserting emergency connectivity service provider, after IP-enabled voice service provider,