Ordinarily, a person would be arrested after he or she has reportedly committed some offence. However there are exceptions to this. Sometimes a person can be arrested simply out of an apprehension that he or she is likely to engage in unlawful activity and imprisoned for some time without following the above mentioned procedure. This is known as preventive detention. It means that if the government feels that a person can be a threat to law and order or to the peace and security of the nation, it can detain or arrest that person. This preventive detention can be extended only for three months. After three months such a case is brought before an advisory board for review. On the face of it, preventive detention looks like an effective tool in the hands of the government to deal with anti-social elements or subversives. But this provision has often been misused by the government. Many people think that there must be greater safeguards in this law so that it may not be misused against people for reasons other than that which are really justified. In fact, there is a clear tension between right to life and personal liberty and the provision for preventive detention. You can see that under the right to freedom there are some other rights as well. These rights however are not absolute. Each of these is subject to restrictions imposed by the government. For example right to freedom of speech and expression is subject to restrictions such as public order, peace and morality etc. Freedom to assemble too is to be exercised peacefully and without arms. The government may impose restrictions in certain areas declaring the assembly of five or more persons as unlawful. Such powers can be easily misused by the administration. The genuine protest against an act or policy of government by the people may be denied permission. However, if the people are aware and vigilant in regard to their rights and choose to protest against such acts of administration such misuse becomes rare. In the Constituent Assembly itself, some members had expressed their dissatisfaction about restrictions on rights.