After we convert our radio system and licenses to 12.5 kHz narrowband

No. When a licensee updates their system to comply with the narrowbanding mandate and upgrades to either a 12.5 kHz or equivalent analog or digital technology, the amended license reflects the original channel assignment, but the amount of authorized bandwidth will be reduced. There are, however, certain digital technologies that comply with the narrowband spectrum efficiency requirement permitting the continued use of 25 kHz authorized channels.

Question: 

After we convert our radio system and licenses to 12.5 kHz narrowband, can we keep the 25 kHz spectrum we were once authorized to use?

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