HI SB1220

Requires each gas utility company in Hawaii to file a proposed initial renewable gas tariff with the Public Utilities Commission by August 31, 2025.

Mandates the Public Utilities Commission establish an initial or revised renewable gas tariff no later than nine months after receiving a completed application, if the tariff is just, reasonable, and in the public interest.

Specifies the renewable gas tariff cannot increase rates for other customers and must be based on eligible customers' net therm usage.

Defines "renewable gas" as gas produced from non-petroleum feedstock and "renewable gas tariff" as a tariff allowing customers to voluntarily purchase renewable gas from a utility company.

Allows the consumer advocate to object to application sufficiency within 21 days, with the commission having 21 days to rule on objections; the nine-month review period begins only after a completed application is filed.