of the relevant market. If the Respondent does not operate within the relevant market as delineated by the Commission, it cannot be said to be in dominant position and consequently abusing it. Neither the information nor the appeal memo nor oral arguments advanced on behalf of the Appellant made a case under Section 3 (4) of the Act suggesting that there was a vertical relationship between the Respondent and the Appellant; the facts also do not support an assessment that there is such a relationship. The argument on behalf of the Appellant that the Respondent could be considered as a consumer only when he paid for a service, is an unsustainable argument. It is quite clear that the Respondent has been taking the services of the Appellant between 2011-2014 and even now prepared to take those services if its conditions were met. There is no doubt that the Respondent is in the nature of a consumer of laboratory testing services for construction material. It is an admitted fact that in order to lay power lines the Respondent outsources construction work and from time to time in order to keep a check on the quality of civil work mandates testing of construction material used in various civil works by third party labs which are accredited by NABL or which could be accredited by any other agency which has a full membership of ILAC/APLAC and a MRA with these organizations. It is a different issue that in India only NABL has a full membership. There is no doubt that several other construction agencies within the government and outside are comfortable with accreditation provided by simply an Associate Member as distinguished from full member who may not have a MRA but the Respondent should have liberty in deciding the standards of quality of work which they expect from their contractors and if full membership and MRA with ILAC/APLAC is considered as an important parameter, we should have no objection to the Respondents adopting that practice. In any case since the Respondent does not operate within the relevant market, the Respondent cannot be said to be dominant in the relevant market and therefore, abusing its dominant position by enforcing a conduct on its downstream partners. The Appellant has himself in his rejoinder stated that PGCIL is engaged in the business of transmitting power and laying power lines across India. Thus, there is no common course of business between the two entities involved in this case and it could not be said that PGCIL exercised any dominant position in the relevant market delineated by the Commission about which the Appellant nurses a grievance.