The contract was between the producers of LB and AEA. AFTRA and MTV were involved, but since the production contract is between the producer and AEA, that is who the taping rider has to be between. The only AEA contract that forbids filming and/or taping is the Showcase code (or 99-seat waiver in LA), otherwise the contracts say "There shall be no televising, broadcasting, visual and/or sound recording, motion picture filming, or video taping, ...without the express permission of Equity and under termsand conditions established by it".
As for the other issue, this is the first time a production has been broadcast in its entirety while it was still in an open-ended run. Everything else before now had either closed or posted a closing notice.
AEA Production Rulebook