AlarmTec,
I am not sure where you are located. In my area, Cal Fire Code 901.7, the local fire department should be notified if any fire systems are removed from service. The systems should be tagged out, and all necessary precautions noted by the fire officials will be enforced. No hot work (cutting, grinding, welding, etc.) will be done, and any processes involving potential ignition sources, or hazardous operations will cease until the fire protection systems are restored.
Key point - hot work is your greatest threat when a fire system is down.
With the above said, some fire departments don't care when you call them, but it is a code requirement.
Secondly, the property insurance company will want to know. If its a large company, Fortune 1000, and they are insured by FM, GAPS, etc then they take these very serious. Their criteria as far as controls/precautions are more stringent than any code.
Lastly, the removal of a jockey pump is technically not an impairment - in my opinion. The jockey is only a pressure maint pump to keep the main pump from cycling due to small pressure fluctuations. Your system will start, and provide water if your main pump is in service with the jockey out of service.