ADA Ticket Sales Policies
http://www.ada.gov/ticketing_2010.htm
US Government ADA Standards 2010
http://www.ada.gov/regs2010/2010ADAStandards/2010ADAstandards.htm
Venue Seating Requirements ADA 2010
Excerpt from the above regarding seating from the US Government ADA Standards 2010
ADA Americans with Disabilities Act of 1990
For facilities built and not remodeled before 2010
http://www.ada.gov/pubs/adastatute08.htm
Comparison: 2010 and 1991 ADA Standards for Accessible Design
http://www.newenglandada.org/sites/default/files/technical_requirements_1.pdf