Dettori revealed in October that he will be ending his fulltime role at the Godolphin stable next year, and last month news broke about his positive test during a race meeting at the Longchamps course in Paris.

"Racing has been good to Frankie and he knows that his privileged position brings with it responsibility," Stewart-Moore said.

"For this reason he is determined to rebuild his reputation when he returns to the saddle."

France Galop said Dettori will have to undergo further drug testing from April 20 before he is allowed to return to racing.

Stewart-Moore said the three-time British champion, who has admitted taking weight-loss drugs in the past, is taking full responsibility for the failed test.

"He is clear that the responsibility for his current situation lies squarely with him," Stewart-Moore said

"From the start of France Galop's inquiry he has acknowledged to them he has made a mistake and that the fault was his.

"Finally, he has asked me to thank everyone for the many messages of support he and his family have received."

The British Professional Jockeys' Association said it would support Dettori's rehabilitation, but denied there was a widespread problem of drug use among its members.

"From 2,607 in-competition urine tests and 3,697 breath tests since 2005, there is no evidence to suggest that there is a fundamental drug problem with jockeys," PJA chief executive Paul Struthers said.