Age mobile homes can be moved?

Most parks in Canada and in many US states, will refuse to allow mobile homes built before 1975 to be moved onto their park, as these may not have been constructed to HUD regulations. Movers are reluctant to move pre-'75 mobiles for that same reason.

As far as I know there is nothing to stop you moving an older home to private property, such as a farm or land where you plan to build a new house. Local building codes would cover this aspect.