Can a Party withhold payment without notifying the other Party under Option Y(UK)2?

NEC3 and NEC4 Contracts Secondary X, W and Y options
1

Can a Party withhold payment without notifying the other Party under Option Y(UK)2?

2

No. A Party cannot withhold payment of an amount due unless he has notified the other Party of his intention to do so (see Clause Y2.3).