▁latter ▁part ▁of ▁Article ▁ 1 8 ▁of ▁the ▁C oven ant ▁of ▁the ▁League ▁of ▁Nations . ▁Con sequently , ▁failure ▁to ▁register ▁a ▁treat y ▁" as ▁soon ▁as ▁possible " ▁is ▁a ▁viol ation ▁of ▁the ▁Char ter ▁and ▁Convention , ▁but ▁does ▁not ▁render ▁the ▁treat y ▁invalid ▁or ▁in effect ive . ▁ ▁Over ▁the ▁years , ▁the ▁UN ▁has ▁developed ▁an ▁extensive ▁treat y - reg istration ▁system , ▁detailed ▁in ▁its ▁Re pert ory ▁of ▁Pract ice ▁and ▁Tre aty ▁Hand book . ▁From ▁December ▁ 1 9 4 6 ▁through ▁July ▁ 2 0 1 3 , ▁the ▁United ▁Nations ▁Secret ariat ▁recorded ▁over ▁ 2 0 0 , 0 0 0 ▁treat ies ▁published ▁in ▁the ▁United ▁Nations ▁Tre aty ▁Series ▁purs u ant ▁to ▁Article ▁ 1 0 2 ▁of ▁the ▁UN ▁Char ter . ▁Still , ▁today ▁" a ▁substantial ▁number ▁of ▁treat ies ▁are ▁not ▁registered , ▁mainly ▁due ▁to ▁practical ▁reasons , ▁such ▁as ▁the ▁administrative ▁or ▁e ph em eral ▁char ter ▁of ▁some ▁treat ies ." ▁Non - register ed ▁treat ies ▁are ▁not ▁necessarily ▁secret , ▁since ▁such ▁treat ies ▁are ▁often ▁published ▁elsewhere . ▁▁ ▁Some ▁true ▁secret ▁treat ies ▁still ▁exist , ▁however , ▁mostly ▁in ▁the ▁context ▁of ▁agre ements ▁to ▁establish ▁foreign ▁military ▁bases . ▁For ▁example , ▁after ▁the ▁ 1 9 6 0 ▁Security ▁Tre aty ▁between ▁the ▁U . S . ▁and ▁Japan , ▁the ▁two ▁nations ▁entered ▁into ▁three