to carry out the salvage operations with due care;

in performing the duty specified in subparagraph (a), to exercise due care to prevent or minimise damage to the environment;

whenever circumstances reasonably require, to seek assistance from other salvors; and

to accept the intervention of other salvors when reasonably requested to do so by the owner or master of the vessel or other property in danger; provided however that the amount of his reward shall not be prejudiced should it be found that such a request was unreasonable.