Should persons register self-employment when selling movable property subject to registration

If the sale of movable property subject to registration is of occasional nature (e.g. the sale of a personal car, when there are no elements of entrepreneurship), then there is no obligation to register self-employment. 

If the sale of movable property subject to registration has elements of continuity or seeking economic gain, then the obligation to register self-employment arises. To determine whether sales meet the above elements of self-employment, the following are taken into account: continuity, repetition, intention to enter into more commercial transactions of a similar nature, motivation to generate income or other economic benefits.