Md. Code, Tax - Property § 2–208

The Department shall attempt to determine the most effective and equitable method to assess property and collect taxes. In particular, the Department shall attempt to determine the best method of reaching all property that is subject to assessment and tax while avoiding taxing the same property twice. For these purposes, the Department may inquire into the laws of other jurisdictions regarding the situs of property for tax purposes and confer with the assessing and tax authorities of other jurisdictions.