; and (2) how such operators have taken into account the effects of hydrogen-natural gas blending on different types of— (A) natural gas pipeline systems materials, including cast iron, steel, composite pipe, and plastic pipe; and (B) components of such systems, including valves and meters. (d) Report Not later than 1 year after the date of enactment of this Act, the Comptroller General shall submit to the Committee on Transportation and Infrastructure and the Committee on Energy and Commerce of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate a report on the results of the study conducted under subsection (a). (e) Rulemaking The results of the study under subsection (a) should inform the rulemaking efforts of the Secretary relating to hydrogen-natural gas blending. The Secretary may determine that rulemaking efforts related to hydrogen should be advanced before completion of the study under subsection (a). (f) Statutory construction Nothing in this section shall be construed to prohibit or otherwise limit the authority of the Secretary to issue regulations relating to hydrogen prior to the submission of the report under subsection (d). 21. Penalty for causing a defect in or disrupting operation of pipeline infrastructure Section 60123 of title 49, United States Code, is amended by adding at the end the following: (e) Penalty for causing a defect in or disrupting operation of pipeline infrastructure (1) In general A person shall be fined under title 18, imprisoned for not more than 10 years, or both, if the person knowingly and willfully— (A) causes a defect in a pipe, pump, compressor, or valve in the possession of a pipeline operator to be used in construction of any pipeline facility described in subsection (b) that would affect the integrity or safe operation of any such facility