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 |
| 2018-19 school year | Don Pedro | Varsity Boys Basketball | 502.A and 502.B | Warning - Do not participate against non-CIF member schools. |
| 2018-19 school year | Keyes Academy | Athletics | 303.B | Violation of multi-school agreement with Waterford HS. Cease and desist order forbiding participation as Keyes Academy in interscholastic athletics. |
| 2018-19 school year | Waterford | Athletics | 303.B | Violation of multi-school agreement with Key Academy / Cease and Desist order from participating as Key Academy in interscholastic athletics. |
| 2018-19 school year | Whitmore Charter | Varsity Boys Basketball | 502.A, 502.B | Warning - Do not participate against non-CIF member schools. |
| 2017-18 school year | Orestimba | Varsity Boys Soccer | 207.1, 207.3 | Forfeit all varsity boys soccer contests in which ineligible player participated (contests have not yet been reported). |
| 2017-18 school year | Placer | JV Baseball | 207.1, 207.3 | Forfeit all JV baseball games in which ineligible player participated (3/26-4/28). |
| 2017-18 school year | Stone Ridge Christian | JV Boys Basketball | 207.1, 207.3 | No action; all contests in which ineligible player participated were losses. |
| 2017-18 school year | Yuba City | Varsity Cross Country and Track and Field | 503.B.1 | Forfeit the following varsity events. Cross Country: Las Plumas Invitational (9/8/17). Track and Field: Steve March Relays at Del Oro HS (3/2/18). Submit a correction action plan, due 9/24/18. |
| 6/14/18 | Sonora | Girls Golf | 504.8 | Illegal practice. Preseason dead period extended by two days. |
| 7/24/18 | Bret Harte | Football | 2003.5, 2007.4 | Practice with helmets ONLY through July 26, 2018. |
| 8/10/18, 8/17/18 | Lathrop | Varsity Football | 2000 | No action; contest in which age-inappropriate player participated was a loss. |
| 8/17/18 | Pacheco | JV Football | 205.B.1.d | Forfeit JV football game vs. El Capitan HS. |
| 8/21/18 | Delta Charter | JV Girls Volleyball | 207.1, 207.3 | No action; contest in which ineligible player participated was a loss. |
| 8/23/18 | Lincoln-S | Varsity Girls Volleyball | 207.1, 207.3 | Forfeit varsity girls volleyball match to Ripon (8/23) for using ineligible player. |
| 8/24/18 | Rodriguez | Varsity Football | 205.B.1.d, 207.1, 207.3 | Forfeit JV football game to Piedmont HS due to participation by ineligible player. |
| 8/24/18 | Rodriguez | Varsity Football | 500.C | Warning |
| 8/31/18 | Golden Valley | Varsity Football | 205.B.1.d | No action; contest in which ineligible player participated was a loss. |
| 8/31/18 | Weston Ranch | Varsity Football | 205.B.1.d | Forfeit varsity football game to Franklin-S HS due to participation by an ineligible player. |
| 11/9/18 | Del Oro | Varsity Footbal | 207.1/207.3 |
Forfeit varsity football games played on 11/9/18 (Tracy), 12/2/18 (Central Catholic) and 12/7/18 (St. Francis) due to participation of an ineligible player. Vacate SJS D2 and Northern California football championships. |
| 11/17/18- 1/15/19 | Vanguard Academy | Varsity Boys Basketball | 502.A, 502.B, 503.C | Forfeit all games (11/17/18, 11/30/18, 12/6/18, 12/14/18, 12/18/18, 12/28/18, 12/29/18, 1/11/19, 1/15/19) in which a non high-school aged player participated. Warning for playing schools that are not CIF member schools (Fusion Charter & Key Academy). |
| 11/24/18- 1/15/19 | Mountain House | JV Boys Basketball | 207.1/207.3 | Forfeit JV boys basketball games played from 11/24/18-12/27/18 due to participation of a residentially ineligible player. |
| 1/6/19, 1/13/19 | Sheldon | Varsity Boys Basketball | 600 | Varsity boys basketball player participated on "outside team" in two basketball games and then participated in four Sheldon HS basketball games. Sheldon HS must forfeit the following four varsity boys basketball games: 1/7/19 vs. Davis, 1/9/19 vs. Pleasant Grove, 1/11/19 vs. Cosumnes Oaks, 1/14/19 vs. Jesuit. Varsity player must sit the following four Sheldon basketball contests: 1/16/19 vs. Elk Grove, 1/18/19 vs. Franklin, 1/19/19 vs. Dublin, 1/21/19 vs. Centennial |
| 1/19/19 | Summerville | Frosh Boys Basketball | 600 | Two (2) freshmen boys basketball players participated (1 game) with an outside team at an AAU tournament - Ineligible for next two contests: 1/22/19 & 1/25/19. |