Very interesting post Mallardo. I don't think the Equity rules are different here, because Musical Theatre Guild does them the same way you describe for Encores (with script in hand). MTG show are "staged readings" and actors are required by Equity to hold their scripts, except during dance numbers I believe. Reprise shows must fall into a different category. I would guess that they are considered actual productions, the only difference being that the orchestra is on stage, and sets are quite simple. Brigadoon was vitually setless (and for that reason I think the production suffered, as it was hard to imagine the heather on the hill), while Babes in Arms and Company had quite clever sets that utilized the orchestra while still giving the feeling of a real stage set. Pippin was somewhere in between. By the way, if you're not familiar with MTG, you should go to their shows. Their full season is at the Alex in Glendale, one performance only. Some of their shows also play in Long Beach and Thousand Oaks. I recently saw them do Redhead (with Jane Lanier) and Roberta (with Kim Huber). Upcoming are Noel Coward's Sail Away (might see it) and Lippa's The Wild Party (June 6, only at the Alex) which I will definitely be seeing. Even script in hand and setless, they do top-notch work, about 90-95% Equity cast, with many Broadway and Regional vets in their casts.
MUSICAL THEATRE LEAGUE