. ▁ ▁The ▁D PL RC ▁and ▁other ▁comm itte es ▁report ▁back ▁to ▁Parliament , ▁which ▁applies ▁a ▁varying ▁level ▁of ▁scr ut iny ▁depending ▁on ▁the ▁exact ▁procedure ▁for ▁that ▁S SI . ▁ ▁Neg ative ▁procedure ▁A ▁negative ▁S SI ▁is ▁an ▁S SI ▁subject ▁to ▁negative ▁procedure . ▁Such ▁SS Is ▁must ▁be ▁laid ▁before ▁Parliament ▁at ▁least ▁ 2 8 ▁days ▁before ▁they ▁come ▁into ▁force , ▁and ▁may ▁be ▁ann ul led ▁by ▁Parliament ▁resolution ▁within ▁ 4 0 ▁days ▁of ▁their ▁being ▁laid . ▁If ▁an ▁S SI ▁is ▁ann ul led ▁after ▁it ▁comes ▁into ▁force , ▁it ▁ce ases ▁to ▁have ▁force ▁from ▁the ▁date ▁of ▁ann ul ment . ▁ ▁Aff irm ative ▁procedure ▁An ▁aff irm ative ▁S SI ▁is ▁subject ▁to ▁aff irm ative ▁procedure . ▁These ▁SS Is ▁must ▁be ▁approved ▁by ▁resolution ▁of ▁Parliament ▁before ▁they ▁can ▁come ▁into ▁force . ▁ ▁Special ▁parliament ary ▁procedure ▁Some ▁SS Is ▁are ▁subject ▁to ▁special ▁parliament ary ▁procedure . ▁These ▁are ▁so - called ▁special ▁procedure ▁orders ▁( SP Os ), ▁and ▁differ ▁from ▁SS Is ▁subject ▁to ▁other ▁types ▁of ▁procedure ▁in ▁that ▁notice ▁of ▁SP Os ▁must ▁be ▁posted ▁in ▁the ▁Edinburgh ▁Gazette ▁( or ▁a ▁local ▁newspaper , ▁if ▁the ▁SP O ▁rel ates ▁to ▁a ▁particular ▁area ) ▁and ▁in ▁that ▁members ▁of ▁the ▁public ▁may ▁object ▁to ▁an ▁SP O . ▁ ▁If ▁an ▁SP O ▁is ▁object ed ▁to , ▁it ▁must ▁be ▁laid ▁before