No annual CITES export quotas for N. mlanjensis have been issued between 2000 and 2013 (CITES 2013) and there is no reported trade in this species between 1977 and 2011 (2012 and 2013 trade data is incomplete or unavailable) (UNEP-WCMC 2013). This species is not known to be present in the captive market.

References:

Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). 2013. CITES Export Quotas. Available at: http://www.cites.org/eng/resources/quotas/index.php. (Accessed: 11 Aug 2013).
UNEP-WCMC. 2013. CITES Trade Database. Available at: http://www.unep-wcmc-apps.org/citestrade/expert_accord.cfm?CFID=50172297&CFTOKEN=72268891. (Accessed: 11 Aug 2013).