Heat pump: Inflation reduction act

When Inflation reduction act goes effective, there is a $2,000 tax credit for installing heat pumps. ‘‘Sec. 25C. Energy efficient home improvement credit.’’.

Is it applicable to heat pumps installed in between Jan 1, 2022 and Dec 31, 2022?  Or, what's the meaning of below line.

https://www.democrats.senate.gov/imo/media/doc/inflation_reduction_act_of_2022.pdf

- Page 351 says "(2) EXTENSION OF CREDIT.—The amendments 2 made by subsection (a) shall apply to property placed 3 in service after December 31, 2021. "