Before being allowed to enter Spanish soil, Ferdinand had to guarantee the liberals that he would govern on the basis of the Constitution, but, only gave lukewarm indications he would do so.
Sebelum memasuki tanah Spanyol, Ferdinand telah dijamin bahwa ia akan memerintah berdasarkan konstitusi, namun ia hanya menunjukan sedikit indikasi bahwa ia akan sungguh-sungguh melakukannya.