Me. Rev. Stat. tit. 24-A, § 2520

In an annuity or pure endowment contract, other than a reversionary, survivorship, or group annuity, there shall be provision that the contract shall constitute the entire contract between the parties or, if a copy of the application is endorsed upon or attached to the contract when issued, a provision that the contract and the application therefor shall constitute the entire contract between the parties.