I know that this is not unique to the Constitution of the Republic of China. Several other constitutions, such as those of Japan, Italy, South Korea, and Spain, also contain provisions on citizens’ duties. Nevertheless, I believe that a constitution should not impose any duties on citizens at all.
A constitution is meant to restrain government, not citizens. Its function is to protect individual rights, while citizens’ duties should be regulated by ordinary legislation rather than by the constitution itself. The purpose of a constitution is to prevent government from infringing upon rights that no reasonable person would willingly surrender.
No private citizen can violate the constitution in the same sense as the government can, and therefore individuals do not have any direct constitutional obligations. This is not to say that citizens have no moral obligation to respect constitutional principles, but rather that the constitution itself should not serve as a direct basis for criminal liability against any citizen.
Even if a constitution contains no provisions on citizens’ duties, the Legislative Yuan can still enact laws imposing various duties. The Legislative Yuan does not need an explicit constitutional authorization for every piece of legislation. For example, even if the constitution says nothing about the duty to pay taxes or perform military service, the Legislative Yuan can still pass tax laws and conscription laws requiring citizens to pay taxes and serve in the armed forces.
The same principle applies in many other areas. If a constitution does not mention banks, the Legislative Yuan can still enact banking laws to regulate them. If a constitution does not mention firefighters, the Legislative Yuan can still pass laws governing fire services. Likewise, even if a constitution does not specify any duties of citizens, the Legislative Yuan can still legislate to create such duties.
As long as legislation does not clearly conflict with the constitution, the Legislative Yuan should be free to enact whatever laws are necessary. Legislation does not require explicit constitutional authorization in every case. If every law required a specific constitutional basis, constitutions would become excessively long, and the legislative power of the Legislative Yuan would be unduly restricted.