Canon 1518

The authority should issue a decree within sixty days from the

receipt of the request for it, unless another time period is prescribed by a particular law of his own Church sui iuris; if this

is not done and the petitioner asks again in writing for the decree, the time period is thirty days; if even then nothing happens, the request is presumed to be negative as if the rejection

happened that same thirtieth day by a decree, so that a recourse

against it can be placed.