An agency may adopt a form as defined in N.H. Rev. Stat. § 541-A:1, VII-a, either by incorporating the actual form by reference in a rule, or by setting forth the requirements of the form in rules, adopted according to the procedures in this chapter and in compliance with the drafting and procedure manual pursuant to N.H. Rev. Stat. § 541-A:8. No new or amended form shall be effective and enforceable pursuant to N.H. Rev. Stat. § 541-A:22, I unless the form has been adopted in accordance with this chapter.