; and (ii) apply to new sources, and existing sources, including— (I) new sources, and existing sources, with equipment that handles liquefied natural gas; (II) new and existing offshore petroleum and natural gas production facilities; and (III) other petroleum and natural gas facilities, as determined by the Administrator. (2) Covered sources The regulations promulgated pursuant to this subsection shall apply to new sources and existing sources of methane within every segment of the oil and natural gas sector. (d) Public health and welfare For purposes of section 111 of the Clean Air Act ( 42 U.S.C. 7411 ), methane emissions from the oil and gas sector are deemed to reasonably be anticipated to endanger public health or welfare. (e) Definitions In this section: (1) Administrator The term Administrator means the Administrator of the Environmental Protection Agency. (2) Existing source; new source; standard of performance The terms existing source , new source , and standard of performance , have the meaning given such terms in section 111(a) of the Clean Air Act ( 42 U.S.C. 7411(a) ). III Incentives for the Accelerated Deployment of 100-Percent Zero-Emission Electricity System 300. Purpose The purpose of this title is to provide support for any given power company to accelerate the deployment of a 100-percent zero-emission electricity generation system as early as possible before 2050. 301. Zero-emission electricity acceleration investment tax credit (a) In general Subpart D of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by adding at the end the following new section: 45U. Zero-emission electricity acceleration investment credit (a) In general For purposes of section 38, in the case of a taxpayer who is a qualified zero-emission electricity taxpayer, the zero-emission electricity acceleration investment credit shall be the applicable percentage of the cost of a qualified zero-emission electricity generating unit. (b) Definitions In this section