(a) A subscribing witness to any will is not incompetent to attest or prove the same by reason of any devise therein in favor of the witness, the witness’s spouse, or the witness’s issue. If there are two disinterested witnesses to a will in addition to the interested witness, then the devise is valid and effectual, if otherwise effective. If there are not two disinterested witnesses to a will in addition to an interested witness, then the devise is null and void to the extent of the value of the excess property, estate, or interest so devised over the value of the property, estate or interest to which the witness, the witness’s spouse, or the witness’ issue would be entitled upon the failure to establish the will. The voided portion of the devise shall pass by intestacy in accordance with § 62-2-101 et seq., provided the share of the interested witness, the witness’s spouse, or the witness’ issue shall not increase due to the devise passing by intestacy.

(b) A subscribing witness to any will is not incompetent to attest or prove the will by reason of any appointment within the will of the witness, the witness’s spouse, or the witness’s issue to any office, trust, or duty. The appointment of a witness, a witness’s spouse, or a witness’s issue is valid, if otherwise so, and the individual so appointed, in such case, is entitled by law to take or receive any commissions or other compensation on account thereof.

(c) A subscribing witness to any will is not incompetent to attest or prove the will by reason of any charge within the will of debts to any part of the estate in favor of the witness, the witness’s spouse, or the witness’s issue as creditor.