Neither is there evidence to suggest that MHICL was a labor-only contractor.[52] There is no proof that MHICL supplied respondent Santos or even referred him for employment to the Palace Hotel. Likewise, there is no evidence to show that the Palace Hotel and MHICL are one and the same entity. The fact that the Palace Hotel is a member of the Manila Hotel Group is not enough to pierce the corporate veil between MHICL and the Palace Hotel. IV. Grave Abuse of Discretion Considering that the NLRC was forum non-conveniens and considering further that no employer-employee relationship existed between MHICL, MHC and respondent Santos, Labor Arbiter Ceferina J. Diosana clearly had no jurisdiction over respondents claim in NLRC NCR Case No. 00-02-01058-90. Labor Arbiters have exclusive and original jurisdiction only over the following:[53] 1. Unfair labor practice cases; 2. Termination disputes; 3. If accompanied with a claim for reinstatement, those cases that workers may file involving wages, rates of pay, hours of work and other terms and conditions of employment; 4. Claims for actual, moral, exemplary and other forms of damages arising from employer-employee relations; 5. Cases arising from any violation of Article 264 of this Code, including questions involving legality of strikes and lockouts; and 6. Except claims for Employees Compensation, Social Security, Medicare and maternity benefits, all other claims, arising from employer-employee relations, including those of persons in domestic or household service, involving an amount exceeding five thousand pesos (P5,000.00) regardless of whether accompanied with a claim for reinstatement. In all these cases, an employer-employee relationship is an indispensable jurisdictional requirement. The jurisdiction of labor arbiters and the NLRC under Article 217 of the Labor Code is limited to disputes arising from an employer-employee relationship which can be resolved by reference to the Labor Code, or other labor statutes, or their collective bargaining agreements.[54] To determine which body has jurisdiction over the present controversy, we rely on the sound judicial principle that jurisdiction over the subject matter is conferred by law