Originally Posted by Matt 26z

Let's break the actual text down...

?In performing its duties, the Commission, through its Board or designated employees or agents,
Translation: Rail police / agents

may:Enter upon the WMATA Rail System
Translation: They have full access to the rail system. No surprise there.

and, upon reasonable notice and a finding by the chief executive officer that a need exists, upon any lands, waters, and premises adjacent to the WMATA Rail System,
Translation: The chief officer has the authority to determine if rail agents need to conduct their duties outside of the rail system itself.

including, without limitation, property owned or occupied by the federal government,
Translation: These operations outside of the rail system must be conducted on property owned by the federal government.

for the purpose of making inspections, investigations, examinations, and testing as the Commission may deem necessary to carry out the purposes of this MSC Compact, and such entry shall not be deemed a trespass.?
Translation: Rail agents, working on orders from their chief, entering federally owned property adjacent to the rail system cannot be considered trespassing.