Dependant's Pass

• Can children of Employment Pass or S Pass holders who are holding a Dependant's Pass or Long-Term Visit Pass study in Singapore without a Student's Pass?
• Can I apply for my Dependant’s Pass before the main pass (PEP, Employment or S Pass) application is approved?
• I am physically based in Singapore while holding a stay pass (e.g. a Dependant’s Pass). Do I need a work pass if I am self-employed or working for an overseas-based employer?