6. A person—N.I.
(a)by or on whose behalf an application was made to a district council;
(b)having any estate or interest in any building or land to which that application relates;
who is aggrieved by—
(i)the refusal of the application;
(ii)any condition subject to which the application was granted;
may, within twenty-eight days (or such longer period as the Department may allow) from the date on which notice was received of the decision of the district council or, as the case may be, from the expiration of the period referred to in paragraph 4, appeal to the Department against the refusal or condition, and in determining that appeal the Department may confirm, revoke or vary the decision of the district council.