It gets weirder and weirder. On ATCBox, somebody pointed to an AIC which is in force as well (
Aeronautical Information Circular Series NETHERLANDS 01/09).
The Ministry of Transport announces in cooperation with the Ministry of Defence that the exemption for the mandatory carriage of a SSR mode S transponder for motorised aircraft below the Schiphol TMA 1 is cancelled with effect from March 12th 2009. From that date motorised aircraft below the Schiphol TMA 1, executing a VFR flight above 1200 ft AMSL shall carry an active SSR mode S transponder. All aircraft with an operational SSR mode S transponder have to activate the transponder below the Schiphol TMA 1.
[...]
Aircraft with an operational SSR mode S transponder have to activate the transponder in all types of airspace, even when it is not mandatory to use a transponder in that area.
[...]
Motorised aircraft that are not equipped with a SSR mode S transponder have only access to airspace with class G below 1200 ft AMSL.
So if you did the investment and fitted your aircraft with mode-S, you've got to turn it on at all times and this means that the SRZ around Schiphol is off-limits. But if you decided to delay and do not have mode-S, you can legally fly around up to 1200' without a transponder. And since the SRZ only applies to "VFR traffic with a mandatory active mode-S transponder", the SRZ doesn't apply to you.
Question: what happens if "accidentally" the circuit breaker popped while I was approaching the SRZ at 1200' or below, making my expensive mode-S unserviceable?