Article 9- It is Mustahab (recommended) for persons who are not able of performing Hajj or do not have other conditions or have performed obligatory Hajj, to perform Hajj and it is Mustahab to perform it every year; but if extra-congestion of Hajjis caused disturbance for people who have not performed their obligatory Hajj yet, then it is preferred not to perform Mustahab Hajj for a while, also it is preferred to give turns to persons who have not performed obligatory Hajj and want to perform for the first time; but if (assumably) the house of Allah has enough places remaining for Hajjis for one year then it is obligatory for the religious governor to send groups people for performing Hajj even if they had performed their obligatory Hajj.
Article 10- Permission of husband is not necessary for wife in performing obligatory Hajj, but it is necessary for performing Mustahab Hajj; and even if Mustahab Hajj hurts father or mother then it has problem.