Here is the IHSAA By-law
60-2 The maximum number of season wrestling dual meets in which any team or student may participate, excluding the IHSAA Tournament Series, shall be Eighteen (18); however, a team or student may participate in additional season tournaments (an interschool wrestling meet which involved Three (3) or more schools is a tournament) up to a maximum of Seven (7), provided each tournament counts as Two (2) of the Eighteen (18) dual meets. A triangular meet (double dual) is counted as Two (2) dual meets towards a team’s Four (4) dual meet maximum permitted. Each weigh-in for any tournament shall count as only One (1) weigh-in toward the minimum requirements for IHSAA Tournament Series qualification.