Are the security of the path (Takhliyat al-Tariq) and the possibility of travel (Imkan al-Maseer) prerequisites for the obligation of Hajj?

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There are differing narrations on these two conditions. One narration holds that they are prerequisites for obligation; thus, Hajj is not obligatory without them because Allah only obligated it upon the capable, and these factors make one incapable, and because performing Hajj is impossible without them, similar to provisions and means of transport. This is the position of Abu Hanifa and Al-Shafi'i. Another narration states they are not prerequisites for obligation but are required only for the immediacy of setting out (Luzum al-Sa'ee). If the five main conditions are met, and one dies before these two exist, Hajj is performed on their behalf after death. If they become impoverished before these two arise, the obligation remains due.