A view to completing restructuring of milk production or to environmental improvement , Member States may take one or more of the following actions in accordance with detailed rules which they shall lay down taking account of the legitimate interests of the parties:(a ) grant compensation in one or more annual instalments to producers who undertake to abandon definitively all or part of their milk production and place the reference quantities thus released in the national reserve,(b ) determine on the basis of objective criteria the conditions under which producers may obtain , in return for payment , at the beginning of a 12 - month period , the reallocation by the competent authority or by the body designated by that authority , of reference quantities released definitively at the end of the preceding 12 - month period by other producers in return for compensation in one or more annual instalments equal to the abovementioned payment,(c ) provide , in the case of land transferred with a view to improving the environment , for the allocation of the reference quantity available on the holding concerned to the departing producer if he intends continuing milk production,(d ) on the basis of objective criteria , the regions or collection areas within which the definitive transfer of reference quantities without transfer of the corresponding land is authorised , with the aim of improving the structure of milk production,(e ) authorise , upon application by the producer to the competent authority or the body designated by that authority , the definitive transfer of reference quantities without transfer of the corresonding land , or vice versa , with the aim of improving the structure of milk production at the level of the holding or to allow for extensification of production