Subject
- Telegraph lines[remove]20
- Bilateral agreements4
- Coastal zones4
- Hydrology4
- Subsidies3
- Boundaries2
- Frontiers2
- Railway lines2
- Security of property2
- Buoys1
- Kings and rulers--Succession1
- Lights1
- Memorandums1
- Military operations1
- Naval operations1
- Post offices1
- Property transfer1
- Sovereignty1
- Territorial disputes1
- Trade (practice)1