The practitioners mentioned in 1° of article L. 6152-1 and in article L. 952-21 of the Education Code who work at least eight half-days a week in public health establishments are authorised to carry out a self-employed activity under the conditions defined in this chapter, provided that the performance of this activity does not hinder the fulfilment of the missions defined in articles L. 6111-1 to L. 6111-1-4 as well as in article L. 6112-1.