Finally, it might be objected that these ethical theories are not sufficiently in line with the principles of information ethics that appear in the professional codes. For example, the [4] ALA (1996) contends that access to library materials should not be restricted on the basis of age. However, according to [22] Frické et al. (2000, pp. 482-3), Rawls's theory cannot be used to defend unrestricted access for children. A person behind the veil of ignorance will not know what her actual age is (e.g. she will not know if she is a child). As a result, it will be important to her that children have access to the information that they need. Even so, she may not support unrestricted access for children. She may reasonably worry that, if she actually is a young child, she will not be competent to decide which materials will be dangerous to her.