Okla. Stat. tit. 58, § 3018
Unless the power of attorney provides a different method for an agent's resignation, an agent may resign by giving notice to the principal and, if the principal is incapacitated:
2. If there is no person described in paragraph 1 of this section, to:
Laws 2021, HB 2548, c. 332, § 18, eff. November 1, 2021.