Tad, I assume you are refering to Maryland rules. (your location says Del.)
In the rules, the definition for traps and pots are;
B. Recreational GearóDefinitions.
(1) The gear defined in this section may be used to catch crabs for recreational purposes.
(2) "Collapsible crab trap" means a manually operated, portable device:
(a) Having a flat bottom not more than 20 inches by 15 inches, and not more than four articulated sides; and
(b) Designed so that failure to apply manually exerted tension on the closing mechanism allows the crabs to escape.
(3) "Crab net ring" means netting supported by a ring-shaped rim less than or equal to 30 inches in diameter. (4) "Crab pot" means a cube-shaped or rectangular shaped device with openings toward the inside for the entrance of crabs.
(5) "Dip net" means a mesh bag of netting or wire which is suspended from a circular, oval, or a rectangular frame attached to a handle.
(6) "Handline" means a fishing line managed primarily by hand.
(7) "Trotline" means a length of rope or line, buoyed at both ends with one or more anchors, which is baited without hooks or snares at intervals for the purpose of catching crabs.
"Seine" means an encircling type of net which is not more than 50 feet long and 5 feet wide.
Hope this helps.