> what you want changing.

I believe @pp-mo is asking for the behaviour in the overlap between these two "mega rules" to be made explicit by removing the overlap.

In other words:
```python
if condition1:
    pp.lbfc = ...CF_TO_LBFC[...]
if condition2:
    pp.lbfc = ...STASH_TRANS[...]
```
Becomes:
```python
if condition1 and not condition2:
    pp.lbfc = ...CF_TO_LBFC[...]
if condition2:
    pp.lbfc = ...STASH_TRANS[...]
```