Sometimes a law is just on its face and unjust in its application. how does king support this claim? by citing the 1954 supreme court decision by describing the fairness of moral laws by describing a law about parade permits by defining illegal segregation statutes

After saying that sometimes a law is just on its face and unjust, Mr Knig passes on to say: "For instance, I have been arrested on a charge of parading without a permit. Now, there is nothing wrong in having an ordinance which requires a permit for a parade. But such an ordinance becomes unjust when it is used to maintain segregation and to deny citizens the First Amendment privilege of peaceful assembly and protest." I that way the answer should be by describing a law about parade permits. 

C Hope's this helps