(2) The permit shall be valid for the length of the event, but not for a period to exceed one year.

(3) No fee shall be charged for permits issued pursuant to this subdivision. m. An institution of higher education operating under authority granted by the state education department, to deliver or cause to be delivered alcoholic beverages to a person who is at least twenty-one years of age enrolled in a single class or course of classes authorized by the institution of higher education and conducted by an instructor or instructors engaged by the institution of higher education, provided that such person's imbibing or tasting of such alcoholic beverages is a required part of the class or course of classes, and provided that such person's imbibing or tasting of such alcoholic beverages is only for instructional purposes. No alcoholic beverage shall be delivered, or shall be permitted to be delivered, to a person under twenty-one years of age during any class conducted under the authority of such permit, and the provisions of subdivision five of section sixty-five and paragraph (a) of subdivision two of section sixty-five-c of this chapter shall not apply to any delivery made during any class conducted under the authority of such permit. 2. Each such permit and the exercise of the privilege granted thereby may be subjected to such rules and conditions by the liquor authority as it deems necessary. 3. Each such permit shall be issued in such form as shall be prescribed by the liquor authority and shall be valid for one transaction only, except that a permit issued pursuant to paragraph b, c, e, j, or m of subdivision one of this section may be issued either for one transaction or for a calendar year. The liquor authority may, by rule, fix the quantity of alcoholic beverages to be involved in a single transaction under a permit issued pursuant to paragraph k of subdivision one of this section, but no single transaction so authorized shall involve more than twenty cases of alcoholic beverages. The fee for each such permit shall be fixed by the liquor authority, but shall not exceed ninety dollars for a permit valid for one transaction only nor two hundred fifty-six dollars for a permit issued for a calendar year.