AMS ceased operation of its Industry Stewardship Plan (ISP) on September 30, 2021, as part of the transition to a new regulatory framework. AMS began operations of its PRO on October 1, 2021.
The final fee period for the AMS ISP was for Q2 2021 sales, with fee rates for Q3 and subsequent quarters applied to PRO customers as summarized in this table:
| Sales Data Period | Reporting Obligation Period | Report Due | Invoices Issued | Payment Due | Notes |
| Q2 (April 1 - June 30) | Q3 | July 31 | August 1 | August 31 | LAST ISP INVOICE |
| Q3 (July 1 - September 30) | Q4 | October 31 | November 1 | November 30 | FIRST PRO INVOICE |
In June 2021, AMS announced prospective fee rates for PRO customers for the Q3 and Q4 2021 sales data periods.
AMS launched its ISP in 2017 with a commitment to providing producers fee rate stability and transparency. Historic fee rates are summarized in this table:
*Base rates before any applicable fee reductions
**Antifreeze fee rates: In 2018, the AMS board simplified administrative requirements for antifreeze stewards who participate in other stewardship programs across Canada by aligning AMS reporting and fee categories with those programs. The Bulk and Packaged antifreeze categories used for 2017 fee rates were replaced by three material categories: Premix, Concentrate and Containers.
Under the Industry Stewardship Organization Surplus Fund Transfer Addendum to the MHSW Wind Up Plan approved by the Resource Productivity and Recovery Authority, the following surplus amounts were received by AMS for each material category:
AMS announced fee reductions for all material categories in July 2020 after receiving its share of MHSW Program reserves from Stewardship Ontario. Fee reductions began in August 2020 and continued through the final ISP invoices issued in 2021, following the extension of the MHSW Program to September 30, 2021. Residual funds from MHSW were distributed to AMS members in July 2022.
Consumer benefit acknowledgment
As a requirement of the MHSW Wind Up Plan, AMS members receiving a fee reduction needed to acknowledge the provincial government’s intent that the fee reductions will benefit consumers. The following statement was included on fee reduction notices:
“By accepting this fee reduction notice, you acknowledge the expectation of the Minister of the Environment, Conservation and Parks that this fee reduction will benefit consumers.”