Code of Maryland Regulations Title 03 — Comptroller
COMAR 03.12.01.03 — § 3 Revenues Derived from the United States.
.03 Revenues Derived from the United States.
A.
Revenues from digital advertising services are derived in the United States when any portion of those services are accessed by devices within the United States. In determining the location of devices in this section, taxpayers shall use a method consistent with their determination of revenues derived from the State.
B.
Taxpayers will determine the location of a device using the totality of the data within their possession or control, as described in
Regulation .02 of this chapter
.
Source: official text