; and (ii) practices located in different geographic areas. (B) Inclusion of small oncology practices In selecting oncology practices to participate in the demonstration project under this section, the Secretary shall, to the extent practicable, ensure that at least 20 percent of the participating practices are small oncology practices (as determined by the Secretary). (4) No penalty for certain opt-outs by practices In the case that the Secretary selects an oncology practice to participate in the demonstration project under this section that has agreed to participate in a model established under section 1115A for oncology services, such practice may not be assessed a penalty for electing not to participate in such model if the practice makes such election— (A) prior to the receipt by the practice of any payment for such model that would not otherwise be paid in the absence of such model