Once the FAA has completed an aeronautical study, a determination is issued regarding the impact to air navigation. One of three responses is typically issued:

Determination of No Hazard - The subject construction did not exceed obstruction standards and marking/lighting is not required.
Determination of No Hazard with Conditions - The proposed construction/alteration would be acceptable contingent upon implementing mitigating measures such as the marking and lighting of the structure.
Determination of Hazard - The proposed construction/alteration is determined to be a hazard to air navigation.

Please note that if at any time during the aeronautical study, the proposed alteration is determined to be a hazard, the study is halted with no further consideration and an objectionable determination is issued.