Can the Airworthiness Review Certificate (ARC) be extended during extensive maintenance/long-term storage?

The CA(M)O that could issue the extension of the airworthiness review certificate should, inter alia, verify that the following two conditions are met: 

1. Controlled environment conditions, M.A.901(b) or ML.A.901(c) are met. 

An aircraft in a controlled environment is an aircraft: 

a) the airworthiness of which has been managed continuously over the last 12 months by a single CAMO or CAO; 
b) the maintenance of which has been carried out during the last 12 months by a maintenance organisation approved in accordance with Part 145 or the EAC Party. 

For aircraft under Part M, this maintenance includes the maintenance tasks referred to in point M.A.803(b) performed and declared fit for service in accordance with points M.A.801(b)1 or M.A.801(b)2. 

In the case of aircraft under Part ML, the maintenance tasks of the pilot-owner performed and declared fit for service by the pilot-owner or by independent certifying personnel are included. 

2. There is no evidence or reason to believe that the aircraft is not airworthy, according to M.A.901(k) or ML.A.901(c)3.  
In the case of an aircraft that is undergoing long-term maintenance/modification or is stored for a long period of time, condition 2 is not met and an extension of ARC should not be issued.