Execution Of Diagnostic Investigations And Carrying Out Technical Checks Aimed At Assessing The Seismic Risk Of School Buildings, As Well As The Consequent Update Of The Relative Mapping, Provided For By Thelopcm 3274/2003 And Subsequent And In Accordance With The Ministerial Decree 17/01/2018 (Ntc2018) And Related Circular Of 21/01/2019 N. 7 Of The C.S.Ll.Pp.