Pravednyk said diplomatic and trade relations, which have existed since 1993, are steadily recovering
Carol Flore-Smereczniak was declared "persona non grata" because of her role in drafting the report that came out in March.
Fighting between the two sides escalated in January, when the M23 captured large parts of the mineral-rich east.
Boat accidents occur regularly in Nigeria due to overcrowding, poorly maintained boats and the failure to enforce safety regulations.
Across the Caribbean, the desire to reconnect with the population's African heritage appears to have strengthened over the past few years.
General al-Burhan has been accused of making unilateral decisions without involving national institutions.
The use of torture was common during the oppressive rule of president Omar al-Bashir.
Officials warned the death toll could rise as recovery operations continued.
He said the voter registration certificate symbolises the progress made in reclaiming peace and democratic rights.
