First. (A) Such appropriation shall be expended by the trustees of the American Printing House for the Blind each year in manufacturing and furnishing books and other materials specially adapted for instruction of the blind; and the total amount of such books and other materials so manufactured and furnished by such appropriation shall each year be distributed among all the public and private nonprofit institutions in the States, Territories, and possessions of the United States, the Commonwealth of Puerto Rico, and the District of Columbia, in which blind pupils are educated. Each public and private nonprofit institution for the education of the blind shall receive, in books and other materials, upon requisition of its superintendent, that portion of the appropriation as is shown by the ratio between the number of blind pupils in that institution and the total number of blind pupils in all of the public and private nonprofit institutions in which blind pupils are educated. Each chief State school officer shall receive, in books and other materials, upon requisition, that portion of the appropriation as is shown by the ratio between the number of blind pupils in public and private nonprofit institutions (in the State) in which blind pupils are educated, other than institutions to which the preceding sentence is applicable, and the total number of blind pupils in the public and private nonprofit institutions in which blind pupils are educated in all of the States, Territories, and possessions of the United States, the Commonwealth of Puerto Rico, and the District of Columbia. The ratio referred to in each of the two immediately preceding sentences shall be computed upon the first Monday in January of each year; and for purposes of such sentences the number of blind pupils in public and private nonprofit institutions in which blind pupils are educated shall be authenticated in such manner and as often as the trustees of the American Printing House for the Blind shall require. For purposes of sections 101, 102, and 104 of this title, an institution for the education of the blind is any institution which provides education exclusively for the blind, or exclusively for the blind and other handicapped children (in which case special classes are provided for the blind); the chief State school officer of a State is the superintendent of public elementary and secondary schools in such State or, if there is none, such other official as the Governor certifies to have comparable responsibility in the State; and a blind pupil is a blind individual pursuing a course of study in an institution of less than college grade.