Gary Haggarty, 44, is no longer to be prosecuted for three alleged offences.
His lawyers said these relate to possessing explosives and firearms.
His legal team are also set to challenge the "propriety" of prosecuting a man they say worked as a state agent for some of the remaining 209 counts against him.
On Wednesday, Belfast Magistrates' Court was told that a hearing to decide if the suspected UVF commander-turned police informer has a case to answer is scheduled for November.
Mr Haggarty has been waiting to discover if he will stand trial since signing an agreement to become an assisting offender under the terms of the Serious Organised Crime and Police Act (SOCPA) back in 2010.
The north Belfast man was charged with 212 charges covering a 16-year period between 1991 and 2007.
The prosecution case against him runs to 12,000 pages, with his alleged offences including:
Mr Haggarty, whose address is listed as c/o the Police Service of Northern Ireland, is believed to be living at a secret location in England.
He was not present for the latest stage in an ongoing court review of the case.
Outside court, Mr Haggarty's solicitor said a challenge would be mounted against some of the remaining charges.
"The defence forwarded written submissions to the PPS on 4 May dealing firstly with charges where we say the papers do not disclose a prima facie case, but also charges where there are issues in relation to the propriety of the charges at a time when the defendant was a state agent from 1993-2004," he said.
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The Turkish government said the bill is not intended to pardon rapists, but to address underage marriage.
The law would allow the release of men who assaulted a minor "without force" and later married the victim.
The controversial bill has already sparked protests across the country.
However, the bill faces opposition from both public and political opposition, and may be withdrawn or changed before the vote in parliament.
In its current form, the bill applies to men who had sexual relations with girls under the age of 18. It allows the indefinite postponement of sentences for sexual abuse committed "without force, threat or trick".
The government said the aim was to exonerate men imprisoned for marrying an underage girl, apparently with her or her family's consent.
Marriage under the age of 18 is illegal in Turkey, but is practised in some parts of the large, predominantly Muslim country.
However, critics say that children cannot give consent, especially in a male-dominated culture, and the bill legitimises rape.
On Saturday, about 3,000 protesters gathered in Istanbul to oppose the legislation.
Protesters clapped and chanted: "We will not shut up. We will not obey. Withdraw the bill immediately!"
"A rape can't be justified," protester Fadik Temizyurek told the BBC.
"What does it mean to ask a child if they're OK? Until they're 18, a child remains a child, that is why this has to be condemned. We are here so that this law can't pass."
The bill follows a previous controversy after Turkey's constitutional court in July annulled part of the criminal code which classified all sexual acts with children under 15 as sexual abuse.
The UN children's fund has said it is "deeply concerned" about the bill.
"These abject forms of violence against children are crimes which should be punished as such, and in all cases the best interest of the child should prevail," said spokesman Christophe Boulierac.
Some charges against a so-called loyalist supergrass accused of a catalogue of murders and paramilitary crimes are to be dropped.
[NEXT_CONCEPT]
Men who had sex with underage girls could have their convictions overturned if they marry their victims, under a bill due before Turkey's parliament on Tuesday.