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We interpret procedural rules de novo, id., looking first to their plain language as the most reliable indicator of meaning and harmonizing the rules when possible, ¶ 7 (2007).

¶16 Moreover, "the [procedural] rules and statutes 'should be harmonized wherever possible and read in conjunction with each other.'" ¶ 22 (2023) ( ¶ 7 (2007)).

To construe statutes, “we apply fundamental principles of statutory construction, the cornerstone of which is the rule that the best and most reliable index of a statute’s meaning is its language and, when the language is clear and unequivocal, it is determinative of the statute’s construction.” ¶ 7 (2007) (citation omitted).

We look first to the plain language of the rule because that is “the best and most reliable index of [the rule’s] meaning.” (quoting Deer Valley Unified Sch.

¶38 “[T]he best and most reliable index of a statute’s meaning is its language and, when the language is clear and unequivocal, it is determinative of the statute’s construction.”

¶ 7 (2007) (quoting Deer Valley Unified Sch.

Co., ¶ 8 (2004); ¶ 6 (2007).

“[T]he best and most reliable index of a statute’s meaning is its language and, when the language is clear and unequivocal, it is determinative of the statute’s construction.” ¶ 7 (2007) (quoting Deer Valley Unified Sch.

We interpret procedural rules de novo, Chartone, ¶ 14 (App. 2004), using principles of statutory interpretation, ¶ 7 (2007).

Ariz., LLC, ¶ 25 (App. 2020) ( ¶ 7 (2007)).

¶ 9 (2007) (“Under the Arizona Constitution, the legislature possesses those powers ‘not expressly prohibited or granted to another branch of government.’” ()); (observing that the legislature exercises the

METCALF Opinion of the Court ___ Ariz. ___, ¶ 22, ().

¶ 7 (2007) (expressing policy of harmonizing statutes and rules whenever possible).

T AL. Opinion of the Court ¶22 In construing statutes and court rules, we apply “fundamental principles of statutory construction, the cornerstone of which is the rule that the best and most reliable index of a statute’s meaning is its language and, when the language is clear and unequivocal, it is determinative of the statute’s construction.” ¶ 7 (2007) (quoting Deer Valley Unified Sch.

¶ 11 (2019); ¶ 7 (2007) (stating that courts apply the same principles in interpreting statutes and rules).

This court reviews the denial of a petition for post-conviction relief for an abuse of discretion, ¶ 19 (2012), reviewing issues of statutory interpretation de novo, ¶ 6 (2007).

¶ 11 (2019); ¶ 7 (2007) (courts apply the same principles in interpreting statutes and rules).

¶ 11 (2019); ¶ 7 (2007) (courts apply the same principles in interpreting statutes and rules).