Section 9(7) of the Citizenship of Zimbabwe Amendment Act, 2001 applies only to persons who actually hold dual citizenship (i.e., who have acquired or become citizens of a foreign country), not to those with mere claims or entitlement to foreign citizenship. The language "acquires" and "becomes" demonstrates legislative intent to address actual foreign citizenship, not potential claims. A Minister exercising discretionary power under statute acts as a tribunal subject to judicial review and must not act unreasonably, arbitrarily, or influenced by extraneous considerations. Where enabling legislation gives a Minister power to extend time periods, failure to exercise that power reasonably when circumstances warrant can be subject to mandatory order. Citizens of Zimbabwe who were permanently resident since 31 December 1985 and who ceased to be citizens remain qualified for voter registration under Schedule 3 paragraph 3(1)(b) of the Constitution as persons "regarded by virtue of a written law as permanently resident in Zimbabwe" since that date. Administrative officials must implement the law as it is, not as they think it ought to be, and cannot arrogate judicial or legislative functions.