Although it recently came to light that the player, who turns 20 in February, was eligible for the Scots through the grandparent rule.
But his recent experiences with the England Knights have convinced him that his international future will be in a white shirt rather than a dark blue one.
“I played for England Knights at end of last year, so if I get in there again, I think I’ll stick with them,” he told Love Rugby League
“I don’t think I’ll be putting myself forward for Scotland.”
The Knights is an excellent concept, according to Clark, who believes that it works well as a development platform from which players can go on to impress.
“If you look at the Knights, then you see plenty of good players there,” he explained.
“If you look throughout Super League, then obviously you have your main players who are in the elite squad.
“But the Knights are all stars who’s played well in Super League, they just need a bit more development.
“It’s a good platform to build from. It’s a stepping stone to give you the chance to impress.
“And if you impress there, then it gives you the chance to impress in the Elite squad.
“It’s never going to be easy to walk into a position in an England team
“It’s good to have competition. It means that if I don’t play well all year then I don’t get that spot.”
With rumours circulating of a Great Britain team being revived, Clark confirmed that it would make no difference to the pride he would feel pulling on an international jersey.
“As a youngster growing up it was always Great Britain,” he said.
“I always watched it and thought that one day I would love to play for Great Britain.