1.   It is obviously harder to clear mines that have been randomly scattered, as in Angola, than those in plainly marked fields.

2.   An international agreement approved Friday in Geneva introduces rules to limit the lifespan of anti-personnel mines planted outside marked fields to three months.

3.   It introduces technical rules to limit the lifespan of anti-personnel mines planted outside marked fields to three months.

4.   It proposes that mines outside marked fields should contain a device so they either destroy themselves or wind down automatically.

5.   Measures under consideration include a requirement that mines laid outside marked fields should have self-destructive or deactivating devices and that they should be detectable.

6.   On the technical level, there are proposals to fit all mines outside marked fields with devices so they destroy or deactivate themselves within weeks.

7.   There are proposals to fit all mines outside marked fields with devices so they destroy or deactivate themselves within weeks.

8.   Many of the mines were put down outside of marked fields, as much for nuisance as military value.

9.   Many of the mines were put down outside of marked fields.