uerte vent ura — 7 ▁until ▁ 2 0 1 8 — 1 5 ▁for ▁Gran ▁Can aria , ▁ 4 ▁for ▁La ▁G om era , ▁ 8 ▁for ▁La ▁Pal ma , ▁ 8 ▁for ▁L anz ar ote ▁and ▁ 1 5 ▁for ▁T ener ife . ▁ ▁V oting ▁is ▁on ▁the ▁basis ▁of ▁universal ▁suff rage , ▁which ▁compr ises ▁all ▁national s ▁over ▁eigh teen , ▁registered ▁in ▁the ▁Can ary ▁Islands ▁and ▁in ▁full ▁enjoy ment ▁of ▁their ▁political ▁rights . ▁Am end ments ▁to ▁the ▁elect oral ▁law ▁in ▁ 2 0 1 1 ▁required ▁for ▁Can arian ▁citizens ▁abroad ▁to ▁apply ▁for ▁voting ▁before ▁being ▁permitted ▁to ▁vote , ▁a ▁system ▁known ▁as ▁" beg ged " ▁or ▁exp at ▁vote ▁( ). ▁Se ats ▁are ▁elected ▁using ▁the ▁D ' H ond t ▁method ▁and ▁a ▁closed ▁list ▁proportional ▁representation , ▁with ▁a ▁threshold ▁of ▁ 1 5 ▁percent ▁of ▁valid ▁votes — which ▁includes ▁blank ▁ball ots ; ▁until ▁a ▁ 1 9 9 7 ▁reform , ▁the ▁threshold ▁was ▁set ▁at ▁ 2 0 ▁percent ; ▁between ▁ 1 9 9 7 ▁and ▁ 2 0 1 8 , ▁it ▁was ▁set ▁at ▁ 3 0 ▁percent — be ing ▁applied ▁in ▁each ▁constitu ency . ▁Part ies ▁not ▁reaching ▁the ▁threshold ▁are ▁not ▁taken ▁into ▁consideration ▁for ▁seat ▁distribution . ▁Alternatively , ▁parties ▁can ▁also ▁enter ▁the ▁seat ▁distribution ▁as ▁long ▁as ▁they ▁reach ▁four ▁percent ▁region ally — three