Although the Act clearly states that the purpose of inviolability is not to benefit particular individuals, but rather to «ensure the efficient performance of the functions of diplomatic missions», it also states that any de-recognition of an embassy must be consistent with international law — in this case the 1961 Vienna Convention. (blog.politics.ox.ac.uk)
Venezuela further argues that, under Article VII of the Headquarters Agreement between Peru and the OAS of July 20, 2017, the Government of Peru has agreed to grant and recognize the OAS and its organs, the delegations of the OAS member states... the privileges and immunities necessary for the independent performance of their functions during the SIRG and Eighth Summit meetings, therefore, Peru could not oppose to the participation of a delegation from Venezuela. (opiniojuris.org)
They are referred to as Cases 3 to 6 and consider the link between the recipient of the bribe (R) requesting, agreeing to receive or accepting an advantage and the improper performance of a function or activity. (newlawjournal.co.uk)