import type { PatternRule } from '../../types.js';
/**
 * NHS number: ten digits where the last is a modulo-11 check.
 * Weights run 10 down to 2; a remainder giving 10 is invalid.
 */
export declare function nhsChecksum(raw: string): boolean;
export declare const nhsRule: PatternRule;
export declare const ninoRule: PatternRule;
export declare const ukPostcodeRule: PatternRule;
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