“The Secretary of State may consider that a person has not substantiated their asylum claim… and thereby reject their application for asylum… if they fail, without reasonable explanation, to make a prompt and full disclosure of material facts, either orally or in writing, or otherwise to assist the Secretary of State in establishing the facts of the case; this includes, for example, failure to report to a designated place to be fingerprinted, failure to complete an asylum questionnaire or failure to comply with a requirement to report to an immigration officer for examination.”