by promotion or by direct recruitment against the substantive vacancy in the institution when the condition precedent for exercise of power exist namely that the Management has notified the said vacancy to the Commission in accordance with the provisions of the Act and the Commission has failed to recommend the name of any suitable candidate for being appointed as a teacher within one year from the date of such notification of the post of such teacher has actually remained vacant for more than two months. However, since the State Government was alive to the situation that the establishment of the Commission may take long time and even after it is established, it may take long time to make available the required teacher in the institution and as such issue three Removal of Difficulties Orders namely Removal of Difficulties Order dated 119-81, Removal of Difficulties Order dated 30-1-82 and Removal of Difficulties Order dated 14-4-1982. In fact these Removal of Difficulties Orders were issued to remove the difficulties coming in the way of a Management in running the institution in absence of teachers. This power to appoint ad hoc teachers by direct recruitment thus, it available only when pre-conditions mentioned in Section 18 of the Act are satisfied, secondly, the vacancy is substantive vacancy and thirdly, the vacancy could not be filled by promotion. Neither the Act nor the Removal of Difficulties Order defines vacancy. However, the vacancy has been defined in Rule 2 (11) of U.P. Secondary Education Services Commission Rules 1983. 'Vacancy' means a vacancy arising out as a result of death, retirement, resignation, termination, dismissal, creation of new post or appointment/ promotion of the incumbent to any higher post in substantive capacity. Thus, both under Section 18 of the Act and under the Removal of Difficulties Order the Management of an institution is empowered to make ad hoc appointment by direct recruitment, in the manner laid down in paragraph 5 of the First Removal of Difficulties Order only when such vacancy cannot be filled by promotion and for a period till a candidate duly selected by the Commission joins the post. As noticed earlier both Section 18 of the Act and the provisions of First Removal of Difficulties Order provide for ad hoc appointment of teacher in the institution, later further providing for method and manner of such appointments are part of one scheme. Scheme being provision for ad hoc appointment of teacher in the absence of duly selected teachers by the Commission. The provisions may be two but the power to appoint is one and the same and therefore, the provisions contained in Section 18 and Removal of Difficulties Order are to harmonized. It is, therefore, not correct to say that appointment of a teacher on ad hoc basis is either under Section 18 of the Act or under the Removal of Difficulties Order. Thus, if contingency arises for ad hoc appointment of teacher by direct recruitment the procedure provided under the first Removal of Difficulties Order has to be followed. Paragraph 5 of the First Removal of Difficulties Order provides that