[2] The SERC is a political appointment made by the Monarch with the advice of the minister in charge of the ministerial department.

The Secretary of State represents the Government in all the bodies of the Cortes Generales which the Government consider important to go; is in charge for all the relations between the executive branch and both Congress and Senate with the exception of draft bills, Royal decree-laws or Royal legislative decrees whose negotiation and follow-up directly falls to the minister responsible.

[2] The raison d'être of this Secretariat of State was the need of establishing proper relations between the Government and the Cortes Generales, because the Constitution established a parliamentary system in which the Government is accountable to the Parliament, unlike the dictatorship period when the legislative power was a mere facade and was subordinated to the executive branch.

[3] This Secretary-General assumed most of the powers of the current official, so it can be considered the direct precursor of the Secretariat of State.

Another relevant change happened in 2020 when it was renamed Secretary of State for Relations with the Cortes and Constitutional Affairs.