Customs exemption for patient assistance programmes expands to include specified drugs supplied under designated company programmes. The notification amends Notification No. 16/2017-Customs by inserting serial entries listing specific drugs, the named Patient Assistance Programmes, and the associated pharmaceutical companies; supplies of those drugs under the listed programmes are exempted from customs duty. The amendment is made under section 25(1) of the Customs Act and takes effect on the stated commencement date.