The most substantial concession  an offer to reduce the players’ guarantee of 57 percent of revenue  was disclosed by Hunter in an interview with The Times last month. Other items, like a push for increased revenue-sharing, have been known for some time. But the rest of the union’s proposal has remained confidential until now.

In his podcast, Hunter outlines these ideas:

¶“Enhanced trade and signing flexibility,” which Hunter characterizes as “a win-win” for players and teams.

Currently, teams that are over the salary cap must match salaries, within 125 percent, to make a trade. The union wants to roughly double the standard to 250 percent, which would, for example. allow a team to trade a player making $10 million for a player making $25 million. The idea is to make trades easier to construct, thus fostering player movement. The union also wants to eliminate “base-year compensation,” an arcane rule that makes it difficult to trade players after they receive a major raise.

¶Reduce the age limit to 18.

In 2005, with the union’s agreement, the N.B.A. began requiring all incoming players to be at least 19 years old and one year removed from high school. The union supported the rule grudgingly and wants it changed back. Hunter is proposing instead that the N.B.A. adopt rules that “incentivize high school and college athletes to attend school.” No specifics are offered, but one possibility would be to adjust the rookie wage scale to reward players who stay in school.

¶Make restricted free agency less onerous.

Under the current rules, when a restricted free agent signs an offer sheet, his team has seven days to match it. That time period is sufficiently long that it discourages rivals from making offers. The union wants to reduce it by several days. It also wants qualifying offers  which trigger the restricted status  to be higher.