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" " The third category involves primarily humanitarian interests . If the " reservists " are asked to work within the IC for extended periods , then some thought has to be given to the issue of clearances and polygraph requirements . We are really under so such constraints . Your past support has enabled us to pave the main access road and camper area , improve two access roads within the Park , and construct a covered grandstand , which provides a comfortable , sheltered public viewing area that is extremely popular with both spectators and vendors .