PDFWAC 480-100-680
Use of RECs and NPAs to comply with the 100 percent renewable or nonemitting standard.
In order to use a REC or NPA to comply with the requirements of RCW 19.405.050(1), a utility must:
(1) Ensure that any REC or NPA retired for compliance is consistent with all requirements of WAC 480-100-670, including the requirements specifically related to primary compliance; and
(2) Demonstrate that the utility did not use the associated electricity for any purpose other than supplying electricity to its Washington retail electric customers.