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(b) * * *
(2) Cattle that have been exposed to splenetic, southern, or tick fever, or that have been infested with or exposed to fever ticks, may be imported from Mexico for admission into the United States, except into areas of Texas quarantined because of said disease or tick infestation as specified in Sec. 72.5 of this chapter, at one of the land border ports in Texas listed in Sec. 93.403(c), the port of Santa Teresa, NM, or the port of San Luis, AZ, provided that the following conditions are strictly observed and complied with:
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