The department may adopt an existing standard different from an ASTM standard specification, as described in paragraph (1) of subdivision (b) of Section 42356, if all the following conditions are met:
(a) The existing standard is adopted or developed by a standard-setting organization recognized by the department, including, but not limited to, the ASTM or another similar organization.
(b) The existing standard adds qualifications to an ASTM standard specification, as described in paragraph (1) of subdivision (b) of Section 42356, including, but not limited to, “home compostable.”
(c) The department determines that the existing standard is more stringent than the ASTM standard specification in paragraph (1) of subdivision (b) of Section 42356 which that existing standard qualifies.