(4) that, in case of illness or accident causing incapacity to work of a certain duration, the worker is repatriated at the expense of the administration; (5) that any worker who may wish to remain as a voluntary worker at the end of his period of forced or compulsory labour is permitted to do so without, for a period of two years, losing his right to repatriation free of expense to himself. Article 18 18, (1) Forced or compulsory labour for the transport of persons or goods, such as the labour of porters or boatmen, shall be abolished within the shortest possible period. Meanwhile the competent authority shall promulgate regulations determining, inter alia, (a) that such labour shall only be employed for the purpose of facilitating the movement of officials of the administration, when on duty, or for the transport of Government stores, or, in cases of very urgent necessity, the transport of persons other than officials, (b) that the workers so employed shall be medically certified to be physically fit, where medical examination is possible, and that where such medical examination is not practicable the person employing such workers shall be held responsible for ensuring that they are physically fit and not suffering from any infectious or contagious disease, (c) the maximum load which these workers may carry, (d) the maximum distance from their homes to which they may be taken, (e) the maximum number of days per month or other period for which they may be taken, including the days spent in returning to their homes, and (f) the persons entitled to demand this form of forced or compulsory labour and the extent to which they are entitled to demand it. 18. (2) In fixing the maxima referred to under (c), (d) and (e) in the foregoing paragraph, the competent authority shall have regard to all relevant factors, including the physical development of the population from which the workers are recruited, the nature of the country through which they must travel and the climatic conditions. 18. (3) The competent authority shall further provide that the normal daily journey of such workers shall not exceed a distance corresponding to an average working day of eight hours, it being understood that account shall be taken not only of the weight to be carried and the distance to be covered, but also of the nature of the road, the season and all other relevant factors, and that, where hours of journey in excess of the normal daily journey are exacted, they shall be remunerated at rates higher than the normal rates. Article 19 19. (1) The competent authority shall only authorise recourse to compulsory cultivation as a method of precaution against famine or a deficiency