New iOS app version and 64-bit support

I have an iOS app already available on the App Store. So far, I've created this app with these settings:

• Architectures: $ (ARCHS_STANDARD_32_BIT)
• Valid architectures: arm64 armv7 armv7s

I had several versions approved this way, the last one in July and the app works great even on iPhone 5S in 32 bit mode.

However, I recently read this ( Application Extension Programming Guide )

A note on 64-bit architecture

The target of an app extension must include the arm64 architecture in its Architecture create customizations or it will be rejected by the App Store. Xcode includes this architecture with its "Standard Architectures" when you create a new application extension target.

If your supporting target app links are included in the native framework, the app must also include the arm64 architecture, or it will be rejected by the App Store.

Does this mean that if I submit a new version of my application now, it must be built for $ (ARCHS_STANDARD), otherwise it will be rejected otherwise? Or would setting arm64 armv7 armv7s

as valid architectures still be sufficient? Is there a time limit for 64 bit support?

Thank you in advance