(1) An agency shall send the quarterly report by July 15 for the first quarter, October 15 for the second quarter, January 15 for the third quarter of the previous year, and April 15 for the fourth quarter of the previous year.

(2) If an agency receives amended disposal information from a facility operator or a hauler, the agency shall send the Board and each affected jurisdiction an amended report for each affected quarter of the previous year. In an amended report, the agency shall highlight or otherwise identify changes from the prior version. The agency shall send the amended report between April 15 and May 15 for the previous year. An agency may not submit amended disposal information to the Board after May 15 for the previous year, unless Board staff specifically request amended information from the agency. The agency shall send amended information to the affected jurisdictions as the information becomes available throughout the year. An agency may send the required amended information to jurisdictions at the time of the next quarterly reporting due date. An agency is not required to send amended information more frequently than once a quarter. An agency is not required to provide amended disposal information for reporting years once the Board has completed the biennial review cycle for those years pursuant to section 41825 of the Public Resources Code.