The Grand Slam Board also continued its push to improve the pace of play.
Players may also be fined if they compete in the first round of a Slam and either retire or "perform below professional standards".
The Australian Open will feature a shot clock while all four Grand Slams will now have 16 seeds as part of a raft of rule changes.
The ruling, created to speed up games, will see players given a maximum of 25 seconds between points. A player would be subject to warnings and eventually point penalties for clock violations. Of course there are different thoughts about this, even Borna Coric, who reached the semifinals in Milan, gave his opinion and said that the introduction of some of these new rules, especially the no-let one, would be well liked by players as they helped him through the whole tournaments.
The timing of the pre-match warm-up will be strictly enforced, with one minute allowed after walk-on to be ready for the pre-match toss, followed by a five minute warm-up, then a further one minute to be ready to commence the match.
The changes with regard to first-round withdrawals, retirements and lack of full effort appear to be in response to what happened at Wimbledon this year.
Grand Slam tournaments will revert to 16 seeds rather than the 32 now used as part of a new set of rules to be enforced over the next year or so.
The seedings system is created to evenly disperse the top players in the 128-player draw so that they will not meet until the later rounds.
Halving the number of seeds is an attempt to make the early rounds of the majors more interesting as it will open the possibility of higher-ranked players facing off before the last 16.
Any player who withdraws shortly before the start of the main draw will keep 50% of their prize money, with the replacement Lucky Loser receiving the other 50% and any prize money won thereafter.