import { AbstractStateRule } from '../abstract-state-rule.js';
/**
 * Validates Tocantins (TO) IE numbers.
 *
 * Accepts 9 or 11 digits. For 11-digit IEs, positions 3-4 carry an era code
 * (01, 02, 03, 99) that is stripped before applying the Mod-11 DV.
 * DV policy: rest < 2 → 0; else 11 - rest. Weights [9,8,7,6,5,4,3,2].
 */
export declare class ToRule extends AbstractStateRule {
    execute(ie: string): boolean;
    private dvMod11;
}