Explanation: Following points can be noted about the characteristics of the Fundamental Duties:

1. Some of them are moral duties while others are civic duties. For instance, cherishing noble ideals of freedom struggle is a moral precept and respecting the Constitution, National Flag and National Anthem is a civic duty.
2. They refer to such values which have been a part of the Indian tradition, mythology, religions and practices. In other words, they essentially contain just a codification of tasks integral to the Indian way of life.
3. Unlike some of the Fundamental Rights which extend to all persons whether citizens or foreigners1, the Fundamental Duties are confined to citizens only and do not extend to foreigners.
4. Like the Directive Principles, the fundamental duties are also nonjusticiable. The Constitution does not provide for their direct enforcement by the courts. Moreover, there is no legal sanction against their violation. However, Parliament is free to enforce them by suitable legislation.

Source: Indian Polity by Laxmikanth