supply of covers for ensuing wbla election 2021 , supply of covers wbla 2021 ( per polling station ) , first cover to contain five sealed covers ( laminated ) size : 20x18 ( green ) , second cover to contain eleven covers ( laminated ) size : 20x18 ( yellow ) , third cover to contain seven sealed covers ( laminated ) size : 20x18 ( brown ) , fourth cover to contain rest of the materials size : 20x18 ( blue ) , ( 1 ) cover for marked copies of electoral rolls ( colour = green ) , ( 2 ) cover for voters register ( 17a ) ( colour - green ) , ( 3 ) cover for voters slip ( colour , ( 4 ) cover for unused tender ballot papers ( colour = green ) , ( 5 ) covers for used tender ballot paper & list of tender votes ( 17 b ) ( colour - green ) , ( 1 ) cover for other copy or copies of electoral rolls ( colour = yellow ) , ( 2 ) cover for letters of appointment of polling agent ( form-10 ) ( yellow ) , ( 3 ) cover for declaration by elector about age/refuse to give declaration about age , ( 4 ) cover for list of challenged votes ( form - 14 ) ( colour- yellow ) , ( 5 ) cover containing the list of blind and infirm electors in form 14-a and the declarartions of companions ( yellow ) , ( 6 ) cover for receipt book & cash forfeited ( colour - yellow ) , ( 7 ) cover for unused and damaged paper seals ( yellow ) , ( 8 ) cover for unused voter slip ( colour = yellow ) , ( 9 ) cover for unused and damaged special tags ( colour - yellow ) , ( 10 ) cover for spoiled and damaged strip seal ( colour - yellow ) , ( 11 ) cover for election duty certificate 12 b , smaller envelopes , big plain envelopes , cover for special booklet , cover containing for pso-5 , cover for account of votes recorded and paper seal account ( 17-c ) , cover for presiding officer diary , cover for vvpat ( colour black ) , plastix box for black paper envelopve sealing , brochure for presiding officer on use of evm and vvpat , mock poll certificate , trouble shsooting on use of evm and vvpat , operational manual of vvpat , poster on how to cast vote on evm and vvpat , forms for declaration by elector under rule 49 ma