Critical Accounting Policies and Estimates NEP's significant accounting policies are described in Note 2 to the consolidated financial statements, which were prepared under generally accepted accounting principles in the U.S. Critical accounting policies are those that NEP believes are both most important to the portrayal of its financial condition and results of operations, and require complex, subjective judgments, often as a result of the need to make estimates and assumptions about the effect of matters that are inherently uncertain.