The specifications for those variations are enumerated in the rule amendments for those divisions and are explained on this website.
usatf.org
legacy.usatf.org
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. pp. 161–162. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. pp. 161–162. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. p. 214. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. pp. 161–162. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. pp. 161–162. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.
"Competition Rules 2012–2013"(PDF). International Association of Athletics Federations. p. 214. Archived from the original(PDF) on 2020-09-17. Retrieved 2019-12-22.