12. Gabby won as Senator in the May 2022 elections for a term of six years. Upon proclamation, Gabby took his oath of office before the Senate President in open session and assumed office at the start of his term. In August 2022, Senator Gabby resigned for personal reasons. In January 2023, Congress enacted a law merging two existing government agencies with a Presidential appointee as head of office. In August 2024, the President appointed former Senator Gabby as head of the merged government agencies. Is former Senator Gabby’s appointment as head of the merged government agencies valid? Explain.