Ed. Code, § 15716

If, after a conditional apportionment has been made to a school district, legal proceedings initiated prior or subsequent to the making of the conditional apportionment prevent the taking, within the period during which the conditional apportionment remains effective under Section 15713, of the actions necessary to permit the conditional apportionment to become final, the conditional apportionment shall nevertheless remain effective for a period of nine months from the date upon which the legal proceedings are finally determined. The amount of the apportionment may be diminished by the board after a second investigation at which the board shall determine whether conditions existing at the time it approved the project for which apportionment was made have so changed that the needs of the district are less than originally determined and if so the conditional apportionment shall be reduced by a corresponding amount.