69. Is it specified that a particular institution(s) is responsible for reviewing financial reports by elected officials?

Within 60 days of filing, financial disclosure reports are reviewed by the respective Ethics Committee to determine whether the report is in compliance with applicable laws, rules and regulations.

GRECO(2017), Evaluation Report on the USA, Corruption prevention in respect of members of parliament, judges and prosecutors, 4th Evaluation Round, p. 25. 

The House Ethics Committee and the Senate Ethics Committee.