Nothing herein contained shall affect rights of action arising, or litigation pending, or orders of the Federal Trade Commission issued and in effect or pending on review, based on , prior to : , That where, prior to , the Federal Trade Commission has issued an order requiring any person to cease and desist from a violation of , and such order is pending on review or is in effect, either as issued or as affirmed or modified by a court of competent jurisdiction, and the Commission shall have reason to believe that such person has committed, used or carried on, since , or is committing, using or carrying on, any act, practice or method in violation of any of the provisions of said , it may reopen such original proceedings and may issue and serve upon such person its complaint, supplementary to the original complaint, stating its charges in that respect. Thereupon the same proceedings shall be had upon such supplementary complaint as provided in . If upon such hearing the Commission shall be of the opinion that any act, practice, or method charged in said supplementary complaint has been committed, used, or carried on since , or is being committed, used or carried on, in violation of said , it shall make a report in writing in which it shall state its findings as to the facts and shall issue and serve upon such person its order modifying or amending its original order to include any additional violations of law so found. Thereafter the provisions of , as to review and enforcement of orders of the Commission shall in all things apply to such modified or amended order. If upon review as provided in said the court shall set aside such modified or amended order, the original order shall not be affected thereby, but it shall be and remain in force and effect as fully and to the same extent as if such supplementary proceedings had not been taken.section 13 of this titlesection 13 of this titlesection 13 of this titlesection 21 of this titlesection 13 of this titlesection 21 of this titlesection 21 of this titleJune 19, 19361936-06-19June 19, 19361936-06-19June 19, 19361936-06-19June 19, 19361936-06-19Provided