Md. Code, Real Property § 3–204

An interest created by a deed granting, assigning, or otherwise transferring an interest in rents or profits arising from property is perfected upon recordation as provided in this title:

(1) Regardless of whether, by its terms or otherwise, the grant, assignment, or transfer is operative immediately, or upon the occurrence of a specific event, or under any other circumstances; and

(2) Without the grantee, assignee, or transferee having to make any affirmative demand or take any further affirmative action.