The statement that it is ideal to have multiple sources of risk data for each type of risk facing the organization so as to enhance reliability is not in line with the governance principle established by the Basel Committee. According to the principle, there should be only one source of risk data, not multiple sources. This is because having multiple sources can lead to inconsistencies and discrepancies in the data, which can in turn lead to inaccurate risk assessments and ineffective risk management strategies. Therefore, it is crucial for banks to have a single, reliable source of risk data that is subject to strong governance arrangements.

Choice A is incorrect. Risk data aggregation forming an integral part of the risk management framework aligns with the governance principle set by the Basel Committee. It ensures that all risk data is collected, processed and reported in a manner that supports risk management decision-making.

Choice C is incorrect. Timely integration of risk data immediately after a new firm is acquired aligns with the governance principle as it ensures continuity in monitoring and managing risks across the organization.

Choice D is incorrect. The allocation of human and financial resources towards risk data aggregation approved by the board also aligns with this principle as it demonstrates commitment at highest level to effective risk management through proper resource allocation.