"but I hasten to ad this is for 99yrs lease"
Here, burial plots traditionally have the stipulation "in perpetuity" tacked in with the legal ownership stuff. Reminds me of just how absolute is "perpetual".
Back in Mayor Richard Daley's glorious days in Chicago, the agreed-upon alignment for the new Congress Expressway tracked clean-through the Jewish Waldheim Cemetery in North Riverside. The survivors of those dead and buried there fought bitterly about digging up their kin, and moving their graves elsewhere. This, evidently, was a very serious "thorn" for the Jewish. Daley, exasperated, finally just ordered, "Dig 'em up!" And they were dug up, perpetuity or no.
True story. I saw it unfold. imp