I believe that most student rush policies only apply to the person actually buying the tickets. LincTix and HipTix both specify that everyone using the tickets must be within the age requirements, but I don't think MTC has any policy in place like that about student rush.
When I see the phrase "the ____ estate", I imagine a vast mansion in the country full of monocled men and high-collared women receiving letters about productions across the country and doing spit-takes at whatever they contain.
-Kad