Section 4

A person may appeal who-

is dissatisfied with the exercise of the discretion of any person to whom dis-cretionary power is given under a written law in respect of any act, matter or thing which is, by the written law, made sub-ject to the exercise of the discretion of such authority;

is dissatisfied with any action or decision of any such person, either as to the carrying out of or the meaning of any of the provisions of the written law; or

considers that any of the provisions _of the written law are, owing to special conditions, undesirable.