interface FormatCnicOptions {
    separator?: string;
    allowLoose?: boolean;
}
/**
 * Formats a CNIC number string into 5-7-1 digit groups with an optional separator.
 * @param value - The CNIC value (string, number, null, or undefined).
 * @param opts.separator - Separator between groups (default '-').
 * @param opts.allowLoose - If true, allows formatting incomplete CNICs.
 * @returns The formatted CNIC string, or null if invalid.
 */
declare const formatCnic: (value: string | number | null | undefined, opts?: FormatCnicOptions) => string | null;
/**
 * Checks whether a value is a valid 13-digit CNIC.
 * @param value - The CNIC value (string, number, null, or undefined).
 * @returns True if the value is a valid 13-digit CNIC.
 */
declare const isValidCnic: (value: string | number | null | undefined) => boolean;

export { formatCnic, isValidCnic };