function checkRC(rc, minAge) {
        // TODO: Vyřešit případ prázdného rč
        if (angular.isUndefined(minAge)) {
            minAge = false;
        }
        var now = new Date();
        var ym = now.getFullYear() - 2000;
        var ypart;
        var birthNum = rc + '',
            valid = true;
        if ((birthNum === '') || (birthNum === null)) {
            valid = true;
        } else if ((birthNum.length !== 10) && (birthNum.length !== 9)) {
            valid = false;
        } else if (birthNum.length === 10) {
            ypart = parseInt(birthNum.substring(0, 2), 10);
            if (ypart < 54 && ypart > ym) {
                valid = false;
            } else {
                var num = parseInt(birthNum, 10) % 11;
                if (num !== 0 && !birthNum.endsWith('0000') && !birthNum.endsWith('9999')) {
                    valid = false;
                }
            }
        } else if (birthNum.length === 9) {
            ypart = parseInt(birthNum.substring(0, 2), 10);
            if (ypart > 53) {
                valid = false;
            }
        }
        if (valid) {
            if (birthNum) {
                var day = parseInt(birthNum.substring(4, 6));
                var month = parseInt(birthNum.substring(2, 4));
                var year = parseInt('19' + birthNum.substring(0, 2));
                if (birthNum.substring(0, 2) <= ym) {
                    year = parseInt('20' + birthNum.substring(0, 2));
                }
                var gender = 'M';
                if (month > 69) {
                    month = month - 70;
                    gender = 'F';
                } else if (month > 49) {
                    month = month - 50;
                    gender = 'F';
                } else if (month > 19) {
                    month = month - 20;
                }

                if (month > 12 || day > 31) {
                    return {
                        valid: false
                    };
                }
                var mm = moment(year + '-' + month + '-' + day, 'YYYY-M-D');
                if (!mm.isValid()) {
                    return {
                        valid: false
                    };
                }
                month = month - 1;
                var d = new Date(year, month, day);
                d.setHours(12);
                var d100 = new Date(year, month, day);
                d100.setHours(12);
                d100.setFullYear(d100.getFullYear() + 100);
                var today = new Date(), bdate;
                today.setHours(12);
                if ((d100 <= today) && (birthNum.length === 10) && (parseInt(birthNum.substring(0, 2)) < 54)) {
                    bdate = d100;
                } else {
                    bdate = d;
                }
                var ageDifMs = Date.now() - bdate.getTime();
                var ageDate = new Date(ageDifMs); // miliseconds from epoch
                var age = Math.abs(ageDate.getUTCFullYear() - 1970);
                if (minAge && age < minAge) {
                    return {
                        valid: false
                    }
                }
                return {
                    valid: true,
                    gender: gender,
                    age: age,
                    datNar: bdate
                };
            } else {
                return {
                    valid: false
                };
            }
        } else {
            return {
                valid: false
            };
        }
    }