Where , in the interests of public health , the laws of a Member State so provide , the competent authorities may require persons responsible for marketing medicinal products derived from human blood or human plasma to submit samples from each batch of the bulk and/or finished product for testing by a State laboratory or a laboratory designated for that purpose before being released into free circulation , unless the competent authorities of another Member State have previously examined the batch in question and declared it to be in conformity with the approved specifications .