Conflicting legal requirements would be of greatest concern when consolidating the information security policies of regional locations, as they may pose significant challenges and risks for the organization's compliance, privacy, and data protection obligations. Different jurisdictions may have different laws and regulations regarding information security, such as the General Data Protection Regulation (GDPR) in the European Union, the Health Insurance Portability and Accountability Act (HIPAA) in the United States, or the Personal Information Protection and Electronic Documents Act (PIPEDA) in Canada. These laws and regulations may have different definitions, scopes, standards, and enforcement mechanisms for information security, which may create conflicts or inconsistencies when applying a unified policy across the organization. Therefore, the information security manager should conduct a thorough analysis of the legal requirements of each location, and ensure that the consolidated policy meets the highest level of compliance and avoids any violations or penalties.
Reference = CISM Review Manual 2022, page 361; CISM Exam Content Outline, Domain 1, Task 1.22; CISM 2020: IT Security Policies; Information Security Due Diligence Questionnaire

Section: INFORMATION SECURITY PROGRAM MANAGEMENT

Explanation
According to the CISM Review Manual, the incident response team should preserve the evidence as the first step to prepare for a third-party forensics investigation, as it helps to maintain the integrity and admissibility of the evidence in a court of law. Preserving the evidence may include isolating and imaging the infected systems, but these are not the only actions required. Cleaning the malware may destroy or alter the evidence and should be avoided until the investigation is completed.
References = CISM Review Manual, 27th Edition, Chapter 3, Section 3.6.2, page 165