The Virginia statute, like others, provides that certain steps do not affect the mortgage priority in connection with a modification. (With Future Advance Clause).The important feature is that the mortgage secures frequent and routine future advances to be added to the loan balance. All senior deeds of trust must be excepted to in Schedule B1, and junior deeds of trust should be listed in Schedule. Section 1.6 Construction Deed of Trust. VA State Bar Number (if applicable):. This is a Credit Line Deed of Trust. (With Future Advance Clause). 52.104 Procedures for modifying and completing provisions and clauses. This manual is intended to assist persons who are involved in the administration of a decedent's estate in Virginia.