VANCOUVER — The B.C. Supreme Court is set to rule on an injunction to halt a blockade against old-growth logging in the Walbran Valley on Vancouver Island, but a lawyer for one of the blockaders says the law is evolving and in need of a “course correction.” The Pacheedaht First Nation has decried the blockade on its traditional territory near Port Renfrew, B.C., claiming it is undermining its authority and should disband. The First Nation said in a statement that forestry is a “cornerstone” of its economy, and is calling for the blockaders to “stand down and leave.” The statement came after Tsawak-qin Forestry Inc., a firm co-owned by the Huu-ay-aht First Nations and Western Forest Products Inc., filed a lawsuit last week in B.C. Supreme Court alleging that “a group of largely unknown individuals” began the blockade of a road on Aug. 25.