Legal capacity is a quality denoting either the legal aptitude of a person to have rights and liabilities (in this sense also called transaction capacity), or altogether the personhood itself in regard to an entity other than a natural person (in this sense also called legal personality). Natural persons Capacity covers day-to-day decisions, including: what to wear and what to buy, as well as, life-changing decisions, such as: whether to move into a care home or whether to have major surgery. As an aspect of the social contract between a state and its citizens, the state adopts a role of protector to the weaker and more vulnerable members of society. In public policy terms, this is the policy of parens patriae. Similarly, the state has a direct social and economic interest in promoting trade, so it will define the forms of business enterprise that may operate within its territory, and lay down rules that will allow both the businesses and those that wish to contract with them a fair opportunity to gain value. This system worked well until social and commercial mobility increased. Now persons routinely trade and travel across state boundaries (both physically and electronically), so the need is to provide stability across state lines given that laws differ from one state to the next. Thus, once defined by the personal law, persons take their capacity with them like a passport whether or however they may travel. In this way, a person will not gain or lose capacity depending on the accident of the local laws, e.g. if A does not have capacity to marry her cousin under her personal law (a rule of consanguinity), she cannot evade that law by travelling to a state that does permit such a marriage (see nullity). In Saskatchewan Canada, an exception to this law allows married persons to become the common law spouse of other(s) prior to divorcing the first spouse. This law is not honored amongst other Canadian provinces. Legal capacity Standardized classes of person have had their freedom restricted. These limitations are exceptions to the general policy of freedom of contract and the detailed human and civil rights that a person of ordinary capacity might enjoy. For example, freedom of movement may be modified, the right to vote may be withdrawn, etc. As societies have developed more equal treatment based on gender, race and ethnicity, many of the older incapacities