The term "extraordinary wages, allowances, or other similar payments, or the wages prescribed by Presidential Decree" in the proviso of Article 43 (2) of the Act means those falling under the following subparagraphs:
1. Allowance for good attendance payable on the basis of the attendance record for a period exceeding one month;
2. Seniority allowance payable for consecutive service for a fixed period exceeding one month;
3. Incentive, proficiency allowance, or bonus calculated on a ground sustaining for a period exceeding one month;
4. Other various allowances paid on an irregular basis.