; or (ii) other monitoring technology with the ability to provide real-time spatial and temporal data to understand the type and amount of emissions. (2) Updates (A) Method 325A and Method 325B If the Administrator determines it necessary to update Method 325A and Method 325B to implement this section, the Administrator shall update such Method 325A and Method 325B not later than 90 days after the date of enactment of this Act. (B) New test method If the Administrator determines it necessary to approve a new test method to implement this section, the Administrator shall finalize such a method not later than 1 year after the date of enactment of this Act. (e) Report Not later than 18 months after the date of enactment of this Act, the Administrator shall report on the results of the program carried out under subsection (a), including— (1) the results of fenceline monitoring implemented under the program under subsection (a); (2) any enforcement, regulatory, or permitting actions taken based on such fenceline monitoring; and (3) whether the Administrator proposes to continue fenceline monitoring at any or all of the stationary sources on the list developed under subsection (c)(1), or to implement fenceline monitoring of any additional stationary sources as determined under subsection (f). (f) Determination regarding additional sources Not later than 3 months before the program under subsection (a) terminates, the Administrator shall make a determination, and publish such determination in the Federal Register, on whether to add fenceline monitoring for any stationary sources to— (1) ensure compliance of such stationary sources with existing emission standards under section 112 of the Clean Air Act ( 42 U.S.C. 7412 ); (2) prevent accidental releases