The law of the Ley del Referendum Nacional (Law of the National Referendum), passed in 1945 approved for all "fundamental laws" to be approved by a popular referendum, in which only the heads of families could vote.
《全国公投法》（Ley del Referendum Nacional）在1945年通过，规定了“基本法律”需要通过公投，其中只有每个家庭的主人才能进行投票。