A person may not introduce in the Port any of the following commodities unless a permit has been obtained from the Manager, SERM or the Manager's designee: Class 1, divisions 1.1 and 1.2 explosives weighing 100 pounds net explosive weight or less, although a permit may not be issued by the MPA until the appropriate request covered by 33 CFR §127.17 has been favorably acted upon by the U.S. Coast Guard; Class 1, divisions 1.1 and 1.2 explosives for construction and repair, although a permit may not be issued by MPA until all permits required by federal, State, county, and city authorities, as appropriate, have been issued; Class 1, divisions 1.1 and 1.2 explosives over 100 pounds net explosive weight in marine transit; Class 1, divisions 1.2 and 1.3 explosives weighing 2,500 pounds net weight or less; Class 1, divisions 1.2 and 1.3 explosives over 2,500 pounds of net explosive weight in marine transit; Certain dangerous cargo (CDC) as defined in 33 CFR §160.204; Class 6, division 6.1 poisons, as defined in 49 CFR §173.132; Fissile material as defined in 49 CFR §173.403; Blasting agents, ammonium nitrate, and certain ammonium nitrate mixtures as specified in 49 CFR §176.415(a), the loading or unloading of which requires the written permission of the U.S. Coast Guard Captain of the Port; or Liquid hydrogen moving under a US DOT exemption. None of the hazardous materials listed in §A of this regulation may remain on any MPA port facility without a valid permit.