Gateway Perpetual Blades (Firewall, IPSec VPN, Mobile Access, Identity Awareness, QoS, ClusterXL, Monitoring, DLP) have a license that never expires; the only way these features would stop working is if someone manually removed the license or it became corrupt.
All remaining blades are Subscription Blades that require a service contract present to operate. Once these features have 30 days or less left on their contracts prior to expiration, you will receive a warning every time you try to install policy to the gateway. There is no way to shut up this warning without loading a new contract.
Traditionally, Subscription Blades have had a 30-day grace period where they will keep working after expiration. However in the latest Jumbo HFAs the grace period was extended to 90 days. To my knowledge here is what will happen to the various subscription blades when they finally go beyond the 90 day grace period:
IPS - Continues enforcing Core Activations & Inspection Settings, but only enforces the "out of the box" ThreatCloud Protections. Any updated/new ones stop being enforced.
APCL - Only custom-created applications still work, no classification for any other applications (would assume they are classed as "unknown")
URLF - Only custom-created Applications/Sites still work (no categorizations for any other sites)
Content Awareness - Not sure, would assume only custom-created Data/File types would work
Anti-spam & Email Security (which no one uses) - Don't know
AV/ABOT- I would assume they stop working completely, as they are constantly dependent on the Check Point ThreatCloud to operate
Threat Emulation/Extraction & Zero Phishing - Don't know, would assume that minimally cloud-based emulation sandboxing would stop working
Attend my online "Be your Own TAC: Part Deux" CheckMates event
March 27th with sessions for both the EMEA and Americas time zones