What are the visa & residency requirements in Bangladesh?

"To apply for a visa to Bangladesh, applicants must submit an application through the Embassy of Bangladesh or an approved visa agency with the approved application forms, a valid passport, one passport-size photograph, and proof of travel arrangements. The application process usually takes up to 15 days to process. To qualify for a residency permit in Bangladesh, foreign nationals must have an approved work permit or employment authorization before they can apply for a residence permit. The application form must be completed and submitted at the local Immigration Office with all necessary supporting documents, including a valid passport and proof of residence. The process takes about 6-8 weeks for processing," said another expat in Bangladesh.