16. A summary of the conclusions on reading of the aforesaid relevant clauses of the contract in question and the judgments as dealt with above, bring out the following salient points:

1. Limitation commences when the cause of action accrues/arises.
2. Accrual/arising of cause of action necessarily varies as per facts and circumstances of each case and the nature of jural relationship between the parties viz contractual or otherwise and so on.
3. As regards contracts for execution of building work, Article 18 comes into play in that when no specific date for payment is fixed, limitation commences and the cause of action accrues for the purpose of limitation on the completion of work.
4. In its application, Article 18 will cause different dates for accrual of causes of action in building works when a time period is fixed for submitting of a bill by the contractor and to which there is no response of the owner. Where a final bill is submitted and liability under the same, even if, in part, is admitted or some payment is made then such actions extend limitation in terms of Section 18 of the Limitation Act.
5. No fresh period of limitation can arise simply because letters and reminders are written time and again, attempting to keep the claim alive, although the claim by virtue of Article 18 of the Limitation Act, has become clearly time barred.