The Council shall set the initial assessment at no greater than one tenth of 1 cent per gallon of odorized propane. Thereafter, annual assessments shall be sufficient to cover the costs of the plans and programs developed by the Council. The assessment shall not be greater than one-half cent per gallon of odorized propane, unless approved by a majority of those voting in a referendum in both the producer and the retail marketer class. In no case may the assessment be raised by more than one tenth of 1 cent per gallon of odorized propane annually.
The owner of odorized propane at the time of odorization, or the time of import of odorized propane, shall make the assessment based on the volume of odorized propane sold and placed into commerce. Assessments collected are payable to the Council on a monthly basis by the 25th of the month following the month of such collection. Propane exported from the United States to another country is not subject to the assessment.
The Council may establish an alternative means of collecting the assessment if another means is found to be more efficient and effective. The Council may establish a late payment charge and rate of interest to be imposed on any person who fails to remit or pay to the Council any amount due under this chapter.
Pending disbursement pursuant to a program, plan, or project, the Council may invest funds collected through assessments, and any other funds received by the Council, only in obligations of the United States or any agency thereof, in general obligations of any State or any political subdivision thereof, in any interest-bearing account or certificate of deposit of a bank that is a member of the Federal Reserve System, or in obligations fully guaranteed as to principal and interest by the United States.