After you give away your abalone you can then be in the possession of another limit as long as it wasn't taken on the same day. The person to whom you give your abalone does not have to possess a fishing license. There are provisions to have two day's limits in possession on Multi-Day Fishing Trips under special procedures. This does not allow a person to take two limits on one day. You are not allowed to help another diver obtain their catch unless your personal take is reduced by the same number of abalone that you helped the other person take.
Size is measured in greatest shell diameter.
All legal size abalones detached must be retained, and a person shall stop detaching abalones when the bag limit is reached. Once you have taken a legal sized abalone you can not take another abalone to replace a smaller legal one that you already have already taken. No undersized abalone may be brought ashore or aboard any boat, placed in any type of receiver, kept on the person, or retained in any person's possession or under his control. Abalone not retained must be replaced immediately with the shell outward to the surface of the rock from which detached. Abalones brought ashore shall be in such a condition that the size can be determined.