This subchapter applies to all statutory public benefit limited liability companies, as defined in § 18-1202(a) of this title. If a limited liability company is formed as or elects to become a statutory public benefit limited liability company in the manner prescribed in this section, it shall be subject in all respects to the provisions of this chapter, except to the extent this subchapter imposes additional or different requirements, in which case such additional or different requirements shall apply, and notwithstanding § 18-1101 of this title or any other provision of this title, such additional or different requirements imposed by this subchapter may not be altered in the limited liability company agreement. If a limited liability company is not formed as a statutory public benefit limited liability company, it may become a statutory public benefit limited liability company in the manner specified in its limited liability company agreement or by amending its limited liability company agreement and certificate of formation to comply with the requirements of this subchapter.