1) In case WHERE it is providedfor by law that a civil transaction must be expressed in writing, such provisions must be complied with.
2) In case WHERE the conditions which give rise to or cancel a civil transaction, the civul transaction shall arise or be cancelled upon the occurence of such conditions.
3) In case WHERE a civil transaction may be understood in different ways, such transaction must be interpreted in the following order:....
Please advise whether we can omit the word "WHERE" in the above sentences and if not, pls explain the function of "WHERE".
Thanks a lot