Maryland Code, Estates and Trusts § 3-409

(a) On receipt of a written request by the surviving spouse, all information necessary to calculate the elective share under this subtitle shall be delivered to the surviving spouse by, as applicable:

(c) Within 60 days after the date a trustee of a revocable trust of the decedent acquires knowledge of the decedent's death, the trustee shall notify the surviving spouse of the existence of the trust, of the identity of the trustees, and of the surviving spouse's right to request a copy of the trust instrument.

(d) On receipt of a written request by the personal representative of the decedent, the trustee of any revocable trust of the decedent, or the person responsible for filing the estate tax return, the surviving spouse shall deliver to the person making the request all information relevant to the calculation of the elective share under this subtitle that is in the possession of the surviving spouse and not otherwise available to the person making the request.