Complex sentence: He officially declared his loyalty to the Republic of Austria on June 5,1961, five days after his formal documentation of his 1958 renounciation of title, which was then ruled satistfactory and in compliance with the Habsburg Law in 1963.
Split into simpler sentences: He officially declared his loyalty to the Republic of Austria on June 5,1961. His second and formal renunciation of Habsburg priviledge, on May 31,1961, was eventually ruled satistfactory and in compliance with the Habsburg Law in 1963.