Learn / Rules by level
Current as of the 2026 season · verify your local rules
The Rules Matrix
| Rule | Youth | High School | College | Pro | Why it matters |
|---|---|---|---|---|---|
| Hash marks | Usually high-school-lined fields (hashes 53'4" apart); some leagues shorten the field itself. | 53'4" apart — the field divides into thirds. A genuine wide side and boundary exist on every hash snap. | 40' apart. Narrower than HS, still wide enough that field/boundary strategy matters. | 18'6" apart, aligned with the uprights. The field is nearly symmetrical. | Sets whether the field has a real wide side — drives formations, coverage rotation, and run direction. |
| Catch: feet inbounds | One foot (follows the high school baseline). | One foot. | One foot. | Two feet — the sideline window shrinks dramatically. | Changes sideline-throw viability and how corners can use the boundary as a friend. |
| Overtime | League-defined; many use short-field alternating possessions or end in ties. | Varies by state; commonly alternating possessions from the 10- or 25-yard line. | Alternating possessions from the 25; two-point tries required from the 2nd OT; from the 3rd OT, alternating two-point plays. | Timed period; both teams are guaranteed a possession. Ties are possible in the regular season. | Changes end-of-regulation decisions: whether to play for the tie, the win, or the kick. |
| Pass interference | Follows high school baseline (15 yards). | 15 yards, no automatic first down — deep contact is 'cheaper,' so deep shots carry more defensive risk tolerance. | 15 yards or the spot of the foul if shorter. | Spot of the foul — a deep DPI can be a 40-yard penalty, so corners must play deep balls honestly. | Penalty severity sets how aggressively defenders can play the deep ball. |
| Targeting / head contact | Strict head-contact rules; heavy emphasis on shoulder tackling instruction. | Disqualification for flagrant contact; states enforce with varying review ability. | Targeting carries ejection plus video review; second-half fouls carry into the next game's first half. | Fines and possible ejection; use-of-helmet rules narrow the legal strike zone. | Ejection-carrying rules change tackling technique and strike-zone discipline. |
| Blocking below the waist | Broadly prohibited. | Legal only within the free-blocking zone under tight conditions; effectively rare. | Restricted to the tackle box at the snap; eliminated in space. | Tightly restricted; cut blocks in space largely legislated out. | Reshapes which run schemes are legal — some classic option schemes depend on low blocks. |
| Clock after first downs | League-defined; running clocks common. | Stops after every first down until the ready-for-play — the national rule, not a state option. Most states add a running-clock mercy rule past a set margin. | Stops on first downs only inside the final two minutes of each half (recent change). | No stop for first downs; the two-minute warning adds a built-in stoppage each half. | Directly changes two-minute and four-minute math. |
| Try (PAT) distances | League-defined; some award extra for kicked tries to encourage the skill. | Snap from the 3 for both kick (1) and scrimmage try (2). | Snap from the 3; the defense can score two by returning a turnover on the try. | Kick snapped from the 15 (a ~33-yard attempt); two-point try from the 2 — a deliberate gap that makes the decision real. | Sets the go-for-two calculus. |
| Play clock | League-defined, often 25–40 seconds loosely enforced. | 40 seconds after most plays / 25 after administrative stops. | 40/25. | 40/25, with tighter operational enforcement. | Bounds tempo as a weapon. |
| Kickoffs | Frequently eliminated — ball placed at a set line. | Kicked from the 40; a kickoff touchback comes out to the 20. Fair catches are allowed anywhere; a few states have adopted college-style spot incentives — check yours. | Fair catch inside the 25 spots at the 25, deflating returns by design. | Redesigned 'dynamic' kickoff with coverage and return units aligned close together to remove full-speed collisions. | The play safety rules have reshaped most. |
| Substitution & roster reality | Minimum-play rules force participation; substitutions are about fairness. | Free substitution but thin rosters — stars play both ways, and fatigue is a strategy. | 85 scholarships; specialization plus tempo-trapping of defensive personnel. | 46 active, total specialization, matchup science. | Not a rule difference but the biggest practical one: it constrains tempo, packages, and conditioning. |