(9)[ Without prejudice to the provisions of any rule, the Director-General may, after giving a show-cause notice to an operator or a person and after making such enquiry as he may deem fit, cancel, suspend or endorse any authorisation or approval or issue warning or admonition to the operator or the person, where he is satisfied that:--(a)the conditions specified by the Director-General under this rule and the [Civil Aviation Requirements].are not being complied with, and(b)the operator or the person has performed work, or granted a certificate in respect of the work which has not been performed in a careful or competent manner or has performed work beyond the scope of its or his approval or failed to make proper entries and certification thereof or for any other reason considered by the Director-General to be sufficient to cancel, suspend or endorse authorisation or approval granted under this rule, or to issue a warning or an admonition.]