That has to do with the Authorized provision of information and when official may provide, allow to be provided or provide access to customs information

Its not amending the Customs Act, so much as bringing it into compliance with the provisions in the Canada Information Sharing Act that regulates which officials, and under what circumstances can access what information.

(4) An official may provide, allow to be provided or provide access to customs information if the information (a) will be used solely in or to prepare for criminal proceedings commenced under an Act of Parliament; (b) will be used solely in or to prepare for any legal proceedings relating to the administration or enforcement of an international agreement relating to trade, this Act, the Customs Tariff, the Special Import Measures Act, any other Act of Parliament or law of a province that provides for the imposition or collection of a tax or duty or Part 2 of the Proceeds of Crime (Money Laundering) and Terrorist Financing Act, before (i) a court of record, including a court of record in a jurisdiction outside Canada, (ii) an international organization, or (iii) a dispute settlement panel or an appellate body created under an international agreement relating to trade; (c) may reasonably be regarded as necessary solely for a purpose relating to the administration or enforcement of this Act, the Customs Tariff, the Excise Act, the Excise Act, 2001, the Excise Tax Act, the Export and Import Permits Act, the Immigration and Refugee Protection Act, the Special Import Measures Act or Part 2 of the Proceeds of Crime (Money Laundering) and Terrorist Financing Act by an official of the Agency; (c.1) may reasonably be regarded as necessary solely for a purpose relating to the enforcement of the Agriculture and Agri-Food Administrative Monetary Penalties Act, the Canada Agricultural Products Act, the Feeds Act, the Fertilizers Act, the Fish Inspection Act, the Health of Animals Act, the Meat Inspection Act, the Plant Protection Act and the Seeds Act by an official of the Agency; (c.2) may reasonably be regarded as necessary solely for a purpose relating to the administration or enforcement of Part V.1 by an official or a class of officials of the Canada Revenue Agency designated by the Minister of National Revenue; (d) may reasonably be regarded as necessary solely for a purpose relating to the administration or enforcement of this Act, the Excise Act, the Excise Act, 2001 or the Export and Import Permits Act by a member of the Royal Canadian Mounted Police; (e) may reasonably be regarded as necessary solely for a purpose relating to the life, health or safety of an individual or to the environment in Canada or any other country; (f) will be used solely for a purpose relating to the supervision, evaluation or discipline of a specified person by Her Majesty in right of Canada in respect of a period during which the person was employed or engaged by, or occupied a position of responsibility in the service of, Her Majesty in right of Canada to administer or enforce this Act, the Customs Tariff, the Special Import Measures Act or Part 2 of the Proceeds of Crime (Money Laundering) and Terrorist Financing Act to the extent that the information is relevant for that purpose; (g) is reasonably regarded by the official to be information that does not directly or indirectly identify any person (h) is reasonably regarded by the official to be information relating to the national security or defence of Canada; or (i) is disclosed in accordance with the Security of Canada Information Sharing Act.

Bold being what is added.