The Comptroller General of the Nigeria Customs Service (NCS), Col. Hameed Ali (rtd), has insisted that neighbouring countries must provide guarantee on full adherence before the borders can be reopened. Nigeria, under a joint Exercise Swift Response, began a partial closure of the borders across four geopolitical zones since August 2019. Col. Ali revealed this on Monday at the Customs headquarters in Abuja after marking the 2020 International Customs Day tagged, “Customs Fostering Sustainability for People, Prosperity and the Planet.” “We are still talking with them. There are parameters of understanding. We have reached certain understanding. We are not only talking about Nigeria, we are also asking them to ensure that their borders are also fortified from our own illicit trafficking.