The full text of the section Crunch refers is as follows, the last sentence is pertinent:
b) Overtaking, according to the circumstances, may be carried out on either the right or the left. A driver may not leave the track without justifiable reason. More than one change of direction to defend a position is not permitted. Any driver moving back towards the racing line, having earlier defended his position offline, should leave at least one car width between his own car and the edge of the track on the approach to the corner.
However, manoeuvres liable to hinder other drivers, such as deliberate crowding of a car beyond the edge of the track or any other abnormal change of direction, are strictly prohibited. Any driver who appears guilty of any of the above offences will be reported to the Stewards.
Federation Internationale de l'Automobile 2020, 'APPENDIX L TO THE INTERNATIONAL SPORTING CODE', FIA International Sporting Code, http://www.fia.com/, P46, accessed 23 FEB 2021.