Muggs
Premiership Player
Google say the 2010 doping rules. Quite clearly extended to staff.
While the code applies to club officials (section 3) the "use" rules only applies to players and still does
2010 code - 11.1 The presence of a Prohibited Substance or its Metabolites or Markers in a Player's Sample.
and 11.2 Use or Attempted Use by a Player of a Prohibited Substance or a Prohibited Method
2015 code -10.2 Presence of a Prohibited Substance or its Metabolites or Markers in a Player's Sample and 10.3 Use or Attempted Use by a Player of a Prohibited Substance or a Prohibited Method.
Coaches are only subject to possession. 11.6(b) 2010 and 10.8(b) 2015
Possession by an Athlete Support Person In-Competition of any Prohibited Method or any Prohibited Substance, or Possession by an Athlete Support Person Out-of-Competition of any Prohibited Method or any Prohibited Substance which is prohibited Out-of-Competition in connection with a Player, AFL Competition or training, unless the Athlete Support Person establishes that the Possession is pursuant to a TUE granted to a Player in accordance with Clause 10 (*9 in 2015 code) (Therapeutic Use) or other acceptable justification
So from a coach perspective they can use, just cant possess under the AFL anti doping code and this has not changed since 2010.