A tiered licensing system could apply to different types of weapons.
“All training is tiered to the level of risk each person may encounter,” said USAMRIID spokeswoman Caree Vander Linden.
But then he vowed to hold the line against a tiered system of justice in America.
"row, rank, range," 1560s, from Middle French tire, from Old French tire "rank, sequence, order" (early 13c.), probably from tirer "to draw, draw out" (see tirade). Some suggests the French noun is from a Germanic source akin to Old High German ziari, German Zier "adornment," Old English tir "glory, honor."