The 57+/60+ Legends divisions rules are extended from the base rules here:

7. The batting line-up will consist of a minimum of 12 batters to a maximum of 21, Each Team in the ***(57+/60+)  Divisions will have an opportunity for 2 shared positions in the Batting Line-up. A Shared position is as such. (Example) if the 3rd batter indicated is chose to share a batter it will be indicated at 3A or 3B and can come to bat or run for each other providing the reach base when that turn comes up.
A shared line may also occur when the batter reaches base and the Team chooses to pitch run, creating a Shared line - That runner  MUST bat the next time that spot in the order occurs.
These batters cannot bat for anyone else in the batting order and are not part of the designated runner rule unless (one or the other) is that last out (batter that was the batted / forced out) must run if the player after him requested a runner if he reach based.
***One note a Shared Position can only be implemented with 12 batters or more in Batting Order!

A substitution to the batting order may be made. However, Once a player is removed from the batting order, he is not eligible to bat / pinch run again in that particular game! But they are eligible to play defensively which includes pitching) 

All possible participants for a game should be listed as extras on the line-up card.
Also all teams are allowed to have any player who has not batted and who is on the lineup card to be placed at the bottom of the batting lineup any time during the game - that player however cannot be dropped from that spot in the batting order to the finish of the game

10. A courtesy runner may be used. Batters requiring a courtesy runner must be designated prior to the game. The last out is to be the courtesy runner, unless he is also so designated, or is the catcher; go to the previous out. In 57+ the limited number of designated batters (4) will be permitted.

14 ***The Legend Divisions 57+/60+
Players must be 57 by Dec. 31 of the tournament year,
Players must be 60 by Dec. 31 of the tournament year,

For 2023 only - 57+  Division
Each team can have up to 4 players 55 by Dec 31 of the tournament year. out of which 2 players "The same ones" are eligible to pitch  HOWEVER (only one) can pitch in any particular game, and all must be highlighted on your team roster when handed in. The Legends' division players must have two items of identification, one with a photo for proof.

For 2023 only -60+ Division
Each team can have up to 3 players 57 by Dec 31 of the tournament year. One (and only one) can pitch and all must be highlighted on your team roster when handed in.