Ruling on allocating some mosques for i‘tikaaf and not others
Question

                In our country the state allocates some mosques for people to observe i‘tikaaf in, and there are other mosques that are not allocated for i‘tikaaf. There are some people who want to observe i‘tikaaf in these mosques, I mean the ones that are not allocated by the state. Are the employees of these mosques sinning if they prevent these people from observing i‘tikaaf there, in accordance with the instructions of the government? Are they included in the words of Allah (interpretation of the meaning): “And who are more unjust than those who forbid that Allaah’s Name be glorified and mentioned much (i.e. prayers and invocations) in Allaah’s mosques” [al-Baqarah 2:114]? If they are sinning by doing that, what about obeying the authorities? Especially since there are other mosques allocated for i‘tikaaf. Please advise us, may Allah reward you with good.
Praise be to Allah.
      Firstly: 

    Mosques are the most honoured places on Earth; they are the 
    houses of Allah and were built for His worship by praying, reading Qu’'aan, 
    remembering Allah, seeking and teaching Islamic knowledge, and i‘tikaaf. 
    Concerning this, the Prophet (blessings and peace of Allah be upon him) 
    said: “… rather they [mosques] are for the remembrance of Allaah, may He be 
    glorified and exalted, and prayer, and reading Qur’aan.” Narrated by Muslim 
    (285). 

    Every Muslim has the right to enter the mosques and worship 
    Allah there, so long as he does that in the prescribed fashion. Based on 
    that, whoever wants to observe i‘tikaaf in some mosque has the right to do 
    that, and no one has the right to prevent him from doing so. The one who 
    prevents him may be included in the meaning of this verse (interpretation of 
    the meaning):

    “And who are more unjust than those who forbid that 
    Allaah’s Name be glorified and mentioned much (i.e. prayers and invocations) 
    in Allaah’s mosques and strive for their ruin? It was not fitting that such 
    should themselves enter them (Allaah’s mosques) except in fear. For them 
    there is disgrace in this world, and they will have a great torment in the 
    Hereafter”

    [al-Baqarah 2:114].

    i.e., no one is more unjust than those who do this. 

    This prohibition is reinforced if it is done because these 
    people who are observing i‘tikaaf are keen to follow the Sunnah and warn 
    people against innovation and tell them not to cause mischief on earth, so 
    restrictions are put on them to prevent them from observing i‘tikaaf in the 
    houses of Allah. 

    Whoever strives -- in this case -- to prevent people from 
    observing i‘tikaaf and staying in the mosques to pray, read the Qur’aan and 
    remember Allah, is sinning and comes under the warning mentioned in this 
    verse. The one who helps him to do that is like him. 

    As for the employees of the mosques, if they can take a 
    stance for the sake of Allah against preventing people from observing 
    i‘tikaaf in the mosques unjustly, this is what they should do, and they 
    cannot afford to do anything else. If they cannot do that, then they should 
    be gentle with the one who wants to observe i‘tikaaf and ask him to change 
    his mind, because it is not wise for a person to observe i‘tikaaf in the 
    mosque and thus cause harm to his Muslim brothers.

     It may be better for him and for the Muslims to observe 
    i‘tikaaf in the mosques where i‘tikaaf is permitted, so that a large number 
    of Muslims will come together, and perhaps that will be a means of teaching 
    them some Islamic rulings that they do not know, or one of them may receive 
    sincere advice (naseehah) that will benefit him. 

    Secondly: 

    Prohibiting i‘tikaaf in some mosques may be acceptable if the 
    mosque is small and does not have enough room for the worshippers, in which 
    case observing i‘tikaaf there would bother the worshippers and make the 
    place even more overcrowded. 

    And Allah knows best.