According to the USATF Competition Rules (Rule 1.1(c), (d)):
(c) The Masters Track and Field Championships are open to all
member athletes of USATF or of other World Athletics member federations
(d) The Masters Long Distance Running Championships are open to all member athletes of USATF, including Permanent Residents. However, only U.S. citizens shall be awarded individual championship awards or score for a team.
In South Carolina, Open and Masters events are open to all athletes. However, only current USATF members who are also current members of the USATF South Carolina Association are eligible for USATF awards from the USATF South Carolina Association.
Only USATF members are eligible to set a USATF record.
Affiliation / Regions
Open athletes (except for Race Walking and Cross Country) who are members of the South Carolina Association are in the South Region, which consists of:
South Alabama, Arkansas, Florida, Georgia, Gulf, North Carolina, Oklahoma, Southern, South Texas, Southwestern, South Carolina, Tennessee, and West Texas
For Open Cross Country, Open Race Walking and all Masters Championships, The South Carolina Association is in the Southeast Region.
Alabama, Florida, Georgia, North Carolina, South Carolina, Tennessee, and Virginia
Age Groups / Divisions
In USATF South Carolina Association Championships, medals shall be awarded to the current USATF South Carolina Association members who finish in the top 3 in each age group in each event. (Rule 330.3, Rule 330.4)
A mixed event containing male and female participants is allowed. Masters records may be made in mixed age and/or mixed sex competitions. (Rule 304.8)
Uniforms are not required in USATF or USATF South Carolina meets. (Rule 330.5)