For each reporting period under this subchapter in which an out-of-state political committee accepts political contributions or makes political expenditures, the committee shall file with the commission a copy of one or more reports filed with the Federal Election Commission or with the proper filing authority of at least one other state that shows the political contributions accepted, political expenditures made, and other expenditures made by the committee. A report must be filed within the same period in which it is required to be filed under federal law or the law of the other state.