One of the dwelling units on a lot containing an accessory dwelling unit must be the principal residence of at least one of the lot owners. Nonindividual lot owners, such as partnerships, corporations, trusts, limited-liability companies or other entities, shall be eligible to receive a special use permit for an accessory dwelling unit only if an owner of such entity, whose ownership interest in such entity is equal to or greater than all other owners of such entity, or a trust beneficiary, whose beneficiary interest in such trust is equal to or greater than all other beneficiaries, occupies one of the dwelling units on such lot containing an accessory dwelling unit as such entity owner's or trust beneficiary's principal residence. Lot ownership shall be evidenced by the last deed recorded in the Ontario County Clerk's office. Ownership of an entity shall be evidenced by a partnership agreement, corporate stock ledger or other corporate document providing such ownership information, limited-liability company operating agreement or other documentation that shows the ownership interests in such entity. Interests of trust beneficiaries shall be evidenced by the trust agreement or by a memorandum of trust executed by the trustees of such trust. Evidence that the dwelling is occupied as the person's principal residence may be established by an affidavit of the record owner, supported by voting records or such competent evidence as would be sufficient to establish a person's principal residence for purposes of voting.