CL technical committee is yet to take a call on Herath's participation as his entry could be tantamount to flouting of the rules of player participation.
Herath was rested by the SLC during the Super 4 domestic T20 competition despite he was billed to play for North Yellows, one of the four teams.
"We are awaiting CL approval for Herath," SLC CEO Ashley de Silva said.
The SLC was keen to include its top spinner in the Maroons squad to bolster their chances in the CLT20 after the Sri Lankan representative teams in the previous editions had been knocked out in the preliminary rounds, sources said.