Frustrated NRL chief executive Dave Smith has called for the Australian Sports Anti-Doping Authority to present any evidence of illegal drug use by players as interviews were again delayed.

Smith, who was informed of the allegations when contacted by the Australian Crime Commission before he officially started in the job, said things needed to move soon.

However, Fairfax Media understands interviews have again been postponed due to legal debate about the level of co-operation they are required to provide.

ARLC chairman John Grant and Smith told a press conference last month that interview requests were being sent to players and outlined a time frame that indicated charges would be laid and players stood down before State of Origin.

With the first Origin teams named in three weeks, that no longer appears possible and Smith said the investigation needed to be concluded soon.