Can I play in an older age category at NAIG?

Yes, but only one category up, and only if your contingent does not already have an athlete or team in that older category. For example, a 14U-eligible athlete (born 2009 or later) could move up to 16U if the contingent has not already entered that athlete or team in 16U.

Age categories are set by year of birth for each sport: 14U is 2009 and later, 16U is 2007 and later and 19U is 2004 and later. Wrestling's 19U category is 2004 to 2008. Not every sport has every category, so a sport with only 16U and 19U (such as soccer) has no 14U.