the certificate, the signatory identified in the certificate held the signature-creation data corresponding to the signature-verification data given or identified in the certificate; c) for assurance that the signature-creation data and the signature-verification data can be used in a complementary manner in cases where the certification service provider generates them both; and d) for failure to register revocation of the certificate. 2) Where a certification service provider has indicated in its certificates, in a manner recognisable to third parties, the limits on the use of the certificates and the limits on the values of transactions for which the certificate can be used, it shall not be liable for damage resulting from exceeding the limits. Availability of Repositories 18. 1) A general purpose repository shall be available at all times of the day and on all days of every year. 2) Subject to the approval of the Commission, a repository may be dedicated for a specific purpose for which specific hours of operation may be acceptable. PART III REPOSITORY FUNCTIONS AND ADMINISTRATION OF SUB DOMAINS IN THE KENYA COUNTRY CODE TOP LEVEL DOMAIN Management of the ccTLD repository and administration of sub domains in the Kenya country code top level domain 19. 1) The Commission may, from time to time, issue guidelines for management of the ccTLD repository and administration of sub domains in the Kenya country code top level domain. 2) Without prejudice of the generality of paragraph (1), such guidelines may require that sub domains assigned under the Kenya country code top level domain do not contain words, phrases or abbreviations that are obscene, scandalous, indecent or in any manner contrary to the law. Obligations of Registrars 20. 1) Registrars shall, before registering any domain name, satisfy themselves that the name so submitted: a. complies with the guidelines issued pursuant to regulation 18; 14