Creation of CIF rules and regulations, developed and approved by member schools, which all schools pledge to observe, began in 1914. This decision established an enforcement program designed to be a cooperative undertaking involving schools, leagues, sections and the State CIF working together for an improved administration of education based interscholastic athletics.
| DATE | SCHOOL | PROGRAM | VIOLATION | PENALTY |
| 2016-17 season | Galt | Football | 207.1, 207.3 | Forfeit the following varsity football contests due to participation of ineligible player: 9/9, 9/16, 9/23, 10/7, 10/14, 10/21, 10/28, 11/4 |
| 2016-17 season | Mira Loma | Football | 1903.3 (2003.3) 1904 (2004) 201.A(4)b 504.7.d 504.9 c&h |
Warning |
| 2016-17 season | Gustine | Track and Field | 207.1, 207.3 | Forfeit all track contests in which ineligible student-athlete participated. |
| 2016-17 season | Foothill | JV Football | 206.2 | $100 fine |
| 2016-17 season | Gustine | JV Football/JV Baseball | 207.1, 207.3 | Participation of ineligible player (all contests were losses, so there is no need to forfeit). |
| 2016-17 season | Lathrop | Freshmen Volleyball | 206.2 | Forfeit all contests in which ineligible student-athlete participated. |
| 2016-17 season | Turlock | JV Girls Volleyball | 207.1, 207.3 | Forfeit all contests in which ineligible student-athlete participated. |
| 2015-17 | Whitney | Football | Probation Violation | Removal from SJS football postseason (2017). On probation through 6/30/2019. In-house training on football rules. Submission of all activities during "Out of season" and "Limited" periods through 2018-19. |
| 9/10/17 | Rocklin | Football | 504.L | Warning |
| 9/2/17 | Vacaville | JV Girls Cross Country | 205.B(1)3 | Forfeit the junior varsity division of the Lagoon Valley Classic held on 9/2/17. |
| 8/18/17 | Elk Grove | Football | 505.3.b | Warning |
| 8/12-13/17 | Napa | Girls Volleyball | 504.L, 504.4 | Loss of two days of practice and one scrimmage. |
| 8/4/17 | Capital Christian | Football | 2003.5 | Loss of the following two (2) days of practice: 8/14/17 and 8/17/17. |
| 8/3/17 | Woodland | Football | 2003.5 | Loss of the following two (2) days of practice: 8/4/17 and 8/7/17. |
| 8/2/17 | Galt | Football | 2003.5 | Loss of the following two (2) days of practice: 8/10/17 and 8/11/17. |
| 6/13/17 | Whitney | Football | 504.8.a.1 | See Violation of Probation. |
| 5/26/17 | Napa | All | Entire athletic program on probation through 6/2018. | |
| 5/20/17 | Bear River | Softball | 501.4 | Softball program on probation through 6/2018; loss of travel expenses for travel on 5/20/17; Fine - $154, cost of umpires. |
| 5/20/17 | Big Valley Christian | Softball | 501.4 | Softball program on probation through 6/2018; loss of travel expenses for travel on 5/20/17; Fine - $154, cost of umpires. |
| 5/20/17 | Buckingham Charter | Softball | 501.4 | Softball program on probation through 6/2018; loss of travel expenses for travel on 5/20/17; Fine - $154, cost of umpires. |
| 4/1 & 3 & 24/17 | Greene Academy | Softball | 600 |
Forfeit the one match in which ineligible student-athlete participated. Student-athlete in question must miss last seven contests of the 2017 season and the first contest of the 2018 season. |
| 2/28/17 | Folsom | Boys Soccer | 600 | Forfeit D1 playoff semifinal for participation by ineligible player. Player in question must miss first six games of 2017-18 soccer season. |
| 2/1/17 | Merced | Baseball | 201.1.1.d, 201.A.4.b, 510 | Warning. Baseball program placed on probation through the 2017-18 school year. |
| 8/8 & 9/16 | Whitney | Football | 1903.4 | Loss of three days of practice for varsity football team, to be completed by 9/19/16. Football program is on probation through 12/31/17. |
| 3/20/16, 4/10/16, 4/17/16, 5/22/16 | Lincoln-L | Football | 503.C, 504.M | Loss of eight days of practice for football program completed by 10/1/16. Football program is on probation through 6/30/17. |