STEP-BY-STEP ANSWER:
Step 1: Identify the change in the accounting principle and determine that it is a voluntary change rather than a correction of an error.
Step 2: Review the previous financial statements to understand how the old principle was applied.
Step 3: Apply the new accounting principle retrospectively, adjusting prior period financial statements for consistency and comparability.
Step 4: Provide detailed disclosures in the current financial statements explaining the nature of the change, the impact on prior periods, and the reason for the change.
Final Answer: The company should restate prior period statements using the new accounting principle and disclose all relevant information to ensure transparency and comparability.