If official election results processed by an electronic tabulation system, at which level results are entered into an electronic tabulation system? - Sierra Leone

Country: 
Sierra Leone
Question: 
If official election results processed by an electronic tabulation system, at which level results are entered into an electronic tabulation system?
Answer: 
Between polling station level and central level (see comments)
Comments: 

Polling station results are sent in sealed envelopes to one of the five Regional Tally Center located throughout Sierra Leone. In these Tally Centers the results are entered into electronic database. These results are later sent to National Tally Center. 

Source: 

National Electoral Commission of Sierra Leone

Online document: “Procedures for Polling and Counting”