▁at ▁a ▁time ▁when ▁they ▁were ▁still ▁without ▁a ▁leader , ▁after ▁the ▁party ▁crisis ▁that ▁led ▁to ▁Pedro ▁S ánchez ' s ▁res ignation ▁and ▁R ajo y ' s ▁invest iture ▁in ▁October ▁ 2 0 1 6 . ▁ ▁Mot ion ▁ ▁Reg istration ▁ ▁The ▁Spanish ▁Constitution ▁of ▁ 1 9 7 8 ▁required ▁for ▁mot ions ▁of ▁no ▁confidence ▁to ▁be ▁proposed ▁by , ▁at ▁least , ▁" one ▁t enth ▁of ▁deput ies " — 3 5 ▁out ▁of ▁ 3 5 0 — and ▁to ▁include ▁" a ▁candidate ▁for ▁the ▁Pres iden cy ▁of ▁the ▁Government ". ▁For ▁a ▁motion ▁of ▁no ▁confidence ▁to ▁be ▁successful , ▁it ▁had ▁to ▁be ▁voted ▁fav ou rab ly ▁by ▁at ▁least ▁an ▁absolute ▁majority ▁( 1 7 6 ) ▁in ▁the ▁Congress ▁of ▁Deput ies . ▁The ▁vote ▁could ▁not ▁be ▁held ▁until ▁at ▁least ▁five ▁days ▁after ▁the ▁motion ' s ▁registration , ▁but ▁the ▁law ▁allowed ▁for ▁other ▁parties ▁to ▁fill ▁in ▁alternative ▁mot ions ▁within ▁the ▁first ▁two ▁days . ▁If ▁the ▁motion ▁is ▁successful , ▁the ▁replacement ▁candidate ▁named ▁in ▁the ▁motion ▁is ▁automatically ▁de emed ▁to ▁have ▁the ▁confidence ▁of ▁the ▁Congress ▁of ▁Deput ies , ▁and ▁the ▁King ▁is ▁required ▁to ▁appoint ▁him ▁as ▁Prime ▁Minister . ▁ ▁On ▁ 1 9 ▁May ▁ 2 0 1 7 , ▁Unidos ▁P ode mos ▁formally ▁registered ▁a ▁no ▁confidence ▁motion ▁against ▁Mar iano ▁R ajo y , ▁moved ▁by ▁the ▁group '