; and (2) the maximum amount of the criminal fine that may be imposed under subsection (e)(5)(B) of this section or section 501 (as the case may be) shall be twice the maximum amount that may be imposed for such violation under such subsection or section without regard to this subsection. . (b) Applicability The amendment made by subsection (a) shall apply with respect to violations occurring after the date of the enactment of this Act. 106. Certain requirements for VoIP service providers Section 227 of the Communications Act of 1934 ( 47 U.S.C. 227 ), as amended by the preceding provisions of this Act, is further amended by adding at the end the following: (m) Certain requirements for VoIP service providers (1) Regulations Not later than 1 year after the date of the enactment of this subsection, the Commission shall promulgate regulations that do the following: (A) Require a provider of covered VoIP service to do the following: (i) Verify the identity of each customer of the provider. (ii) Proactively and continuously monitor and analyze traffic on the service of the provider to determine whether any customer of the provider has engaged or is engaging in a pattern or practice of making robocalls using the service of the provider. (iii) If the provider ascertains, through the monitoring and analysis required under clause (ii) or other means, that a customer of the provider has engaged or is engaging in a pattern or practice of making robocalls using the service of the provider, conduct an investigation to determine expeditiously whether there is substantial evidence that the customer has committed or is committing any violation of this section, or any other applicable law or regulation, with respect to such robocalls. (iv) If the provider determines in an investigation conducted under clause (iii) that there is substantial evidence that the customer has committed or is committing any violation described in such clause, not later than 10 days after making the determination— (I) take affirmative, effective measures