“We’ve got some specialist advisers helping us through the process,” Salford chief executive Martin Vickers said.
“The wheels are in motion and, as far as we’re concerned, there shouldn’t be any complications.
“The offences are quite dated and we’re quietly confident it won’t be an issue.
“We are in the hands of the authorities but we are told at best it could be a couple of weeks.”
Locke has apparently fallen out with NZ Warrriors coach Andrew McFadden, so will be joining the Red Devils sooner than expected.
He was supposed to be joining Salford on a three-year deal from November, but will join early once any paperwork issues are resolved.
Once the Kiwi test star has his visa, he is expected to jet straight to England.