Complex sentence: On May 7,1963, government officials invoked a rarely enforced 1958 law known as Decree Number 10 to prohibit the display of religious flags, forbidding Buddhists from flying their flag on Vesak, the birthday of Gautama Buddha.
Split into simpler sentences: On May 7,1963, government officials invoked a rarely enforced 1958 law known as Decree Number 10 to prohibit the display of religious flags. In doing so, they disallowed the flying of the Buddhist flag on Vesak, the birthday of Gautama Buddha.