
Director of drug and alcohol services at St Vincent's Hospital Jon Curie said the policy enabled players to seek help before developing a dangerous addiction.
"To have just 14 out of the whole roster of AFL players is a very good result," he told AFL.com.au.
"The results are very pleasing and they show the policy is very useful in essentially bringing medical treatment to the players, while bringing recognition that drug use won't be tolerated.
"It shows drug use is watched and monitored, because if players give a positive test they are under very careful scrutiny with the target testing and are given the ability to seek help early on.
"It's sending a message to the public that it is something dangerous and not acceptable but it is something that can be reduced.
"What we're hoping for is further strengthening of the educating and treatment policies so the numbers can still drop further."
The National Drug Research Institute (NDRI) said it was important for the AFL to maintain the transparent approach to testing and rehabilitation.
"The AFL's focus on supporting players and a harm minimisation approach to its alcohol and illicit drug program is in line with what works to help prevent the harm caused by alcohol and other drugs," NDRI Director Professor Steve Allsop said.
"It should be supported for adopting an approach that is multifaceted, has the support of players and management and is transparent and universal.
"All of these are key ingredients in effective responses to alcohol and other drug problems in any workplace.
"The AFL's focus on player welfare, education and rehabilitation is an effective way to prevent young men from using alcohol or other drugs in a harmful way and in helping those that get into difficulty."
Allsop also said the initiative to send players to drug and alcohol specialists after their first failed test was an important aspect of the policy.
The Alcohol and other Drugs Council of Australia (ADCA) also supported the campaign's continuation and congratulated the league on the falling number of positive tests.
"The AFL players and clubs are also to be commended for working together to reduce the prevalence of illicit drugs within the AFL community," ADCA CEO David Templeman said.
"It is encouraging to note that the AFL Players' Association acknowledges the importance of harm minimisation."
Exclusive to AFL BigPond Network