"Flies may be dressed on single or double hooks; tandem flies are not permitted. In the case of a double hook, the angle between the bends shall not exceed 90 degrees and, when viewed from the side, the bends must lie one behind the other. No fly shall be artificially weighted. No more than 4 flies, only one of which may be dressed on a double hook, may be mounted on a cast and flies must be at least 20 inches apart. Hooks may not measure more than five-eighths of an inch overall, including the eye. The overall length of the fly may not exceed fifteen-sixteenths of an inch. Suspected illegal flies should be put into an envelope and signed over the seal by the angler/boat partner/boatman. The envelope should be presented to a Match Official at the end of the competition. Attractor chemicals and light emitters may not be used on flies."
International rules
Linear Mode
