How do time limits, tiebreakers and forfeits work at Under 16 and Under 18 nationals?

From the 2027 Australian Championship Regulations:

• Time limit (section 18): for Under 16 to open-grade championships, Softball Australia may decide to apply a game time limit at some championships. If it does, a new inning will not start once 80 minutes has elapsed at the last out of a completed inning, but an inning in progress is completed until a winner is decided. If the scores are tied after that inning, the tiebreaker applies.
• Tiebreaker (17.5): starting with the top of the 8th and 9th innings, the player scheduled to bat ninth in that half-inning starts on second base. From the top of the 10th inning and every half-inning after, that player starts on third base. A substitute may run in accordance with the substitution rules.
• Forfeits (15.1 and 15.2): a forfeited game is scored 7-0 to the team not at fault. A forfeit for any reason other than injury or ejections brings a $500 fine and the loss of two competition points per forfeit.