Citizenship after ILR (14 year rule)

Apologies if this is answered elsewhere, have had a look but no luck:
After having obtained ILR via the 14 year rule (before it was abolished), I have had conflicting info about when one is eligible for British Citizenship. I have heard one qualifies to apply after 12 months of obtaining ILR but my query is due to the fact that within the last 5 years, one would have been in breach of immigration rules? Does this mean any legal 5 years is counted or does this mean one has to wait for 5 years instead?
Have also heard it could go either way and it's up to your Case worker's discretion. True or False?

Advice appreciated.

Naturalisation is by discretion anyway. However, see paragraph 8 - https://www.gov.uk/government/uploads/s ... dments.pdf