The law has been enforced to stop International Friendly's from taking advantage of no set maximum for substitutes. Before today clubs could field any number of substitutes as long as both managers and officials were in agreement prior to the kick-off.
I think the authorities have got it wrong on this one," Warnock, preparing his side for their opening pre-season friendly against Matlock, told sufc.co.uk.
"The idea behind games like this is to give everyone an opportunity for part of a game - they're simply not ready at this stage of their preparation to play 90 minutes.
"It will cause us a re-think about who we can use in these games in order to see everyone."