Works For The Replacement Of The 'Lift With Rae 58090-B Of The Library Of The Main Building Of The Faculty Of Law And The Elevator With Rae 84527-B Of The Library Of Letters Of The Historical Building, Of The University Of Barcelona, ​​In Accordance With The Complementary Technical Instruction Itc Aem 1 `` Lifts'', Regulating The Commissioning, Modification And Inspection Of The Elevators, Existing Elevators, Approved By Royal Decree 355/2024, Of April 2, And Published In The Boe On April 13, 2024. Instruction That Forces The Update And Standard Of The Elevators That Have Become Obsolete, In Accordance With The One Described In The Executive Project.