I was just on Playbill looking at job listings. The tour of South Pacific lists a "Tier D" contract. What other types of contracts are there, and what's the difference between them?
Just a quick glance at the document library on the Equity website will show you that your question is far too general for anything short of a thesis length essay.
To directly answer your question, there are 45 types of Equity CONTRACTS. The "Tier" references how many seats the venue holds. The more seats in the theater, the higher the Minimum Weekly Salary.
There is Tier B, Tier C, and Tier D. Tier D pays the lowest minimum of the three.
I'm having difficulty finding where the description of tiered contracts are and what, specifically, the differences are constructed of...
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle
The Production Contract Tiers (which is what we are talking about in regards to South Pacific) have nothing to do with seating capacity. The tiers are determined by the average guarantee the producers are charging. The guarantee is the amount that the presenters pay to the producers to bring a show into their venue.
I was just coming back to say that I mistook another contract's definition of Tiers with the Equity/League Production contract.
AEA AGMA SM, whose user name is also a kind of contract, is correct.
"The Spectacle has, indeed, an emotional attraction of its own, but, of all the parts, it is the least artistic, and connected least with the art of poetry. For the power of Tragedy, we may be sure, is felt even apart from representation and actors. Besides, the production of spectacular effects depends more on the art of the stage machinist than on that of the poet."
--Aristotle