Third Era (2015-)

The League is organized into three divisions: Nova, Stella, and Male — each featuring 36 Contestants.
The Regular Season consists of five Periods - Aquamarine, Amethyst, Ruby, Emerald, and Topaz.
Sapphire and Diamond are used for the Division Finals. League Finals are single-elimination.
A Tournament of Champions is held, featuring all previous Tiara winners including the present year.

Second Era (2012-2014)

The League is organized into two divisions, Nova and Stella, each featuring 36 Contestants.
The Regular Season consists of five Periods - Aquamarine, Amethyst, Ruby, Emerald, and Topaz.
Sapphire and Diamond are used for the Division Finals. League Finals are single-elimination.

First Era (2008-2011)

All Contestants are in a single pool, starting with 64, then reducing to 50 in 2010.
The Regular Season consists of seven Periods: Aquamarine, Topaz, Amethyst, Sapphire, Emerald, Ruby, and Diamond.
The Postseason is a double-elimination format through 2010 with single-elimination in 2011.