General rules:
-Paizo and DSP content are treated on mostly equal grounds. Non-Paizo non-DSP content may be allowed on a case-by-case basis after a thorough review. Generally allowed DSP content: everything on pfsrd at the moment of writing this (3.5.2015, this includes base PoW and Psionics Unleashed) + archetypes for Paizo classes from PoW:E. Other DSP content may be allowed on a case-by-case basis on the same terms as general 3pp content.
-Tier 1 classes are off limits for player characters. No exceptions.
-Tier 5 or lower classes will undergo a case-by-case reworking process with the aim to bring them up to at least tier 4 if a player voices the desire to play such a class while refusing to take an existing tier-boosting archetype.
-Some classes might be disallowed for thematic reasons on a case-by-case basis, unless a major refluffing is performed.
-Leadership and Craft Construct are off limits for player characters. As are feats duplicating the Leadership feat’s functionality or parts of it. Players wanting to use construct armor are encouraged to use the Aegis class for essentially much more streamlined and balanced construct armor rules.
-Paragon surge is banned. Forever. As is blood money.
-Master summoner and broodmaster archetypes are banned since they’re way too much hassle to bother with.
-Craft skill generally uses the “Making Craft Work” rules. DC’s and craft times will be specified by the DM on an item-by-item basis.
-The DM reserves the right to make judgements on what reading is the correct one in the case of abilities with questionable wording.
-No companions of any kind (‘any’ kind includes animal companions, familiars, and whatever other similar things there may be) may advance to a higher level than the character’s total character level. Even if the abilities seem to suggest that RAW. Even if that is stated explicitly. No exceptions.
-Monster feats may only be taken with explicit DM approval.
-Weapon finesse is a weapon quality rather than a feat. All melee dex-to-damage feats are replaced with DSP deadly agility. Ranged characters without such a class feature may get dex-to-damage in a way specified by the DM on a case-by-case basis.
-Upon gaining 6 BAB, characters may choose between gaining Vital Strike or Iterative Attacks. These automatically progress at 11 and 16 BAB. The alternative option may be taken as feats. These feats do not automatically progress.
-Mobility and dodge are combined into one feat.
-Feats usually applying to one weapon such as weapon focus apply to a chosen fighter weapon group instead.
-Combat expertise is given for free as a combat option to any character with at least +1 total BAB (e.g. a sorcerer would get this at level 2) the same way as drawing a weapon as part of a move action.
-Point-blank Shot is a prerequisite for Point-blank Master (unlike RAW), but not for any other feat in the game.
-Two-weapon Fighting automatically advances to Improved and Greater versions of the feat. Improved maneuver feats automatically advance to Greater versions upon meeting requirements.
-Vigilantes are to be refluffed with second identity class feature removed (no replacement) in most cases (except if a reasonable argument for keeping it is made), if someone wants to play as one.
-The planar binding is limited to total summon CR (as encounter CR) of 5 for lesser, 9 for regular, 13 for greater.
-Shadow casting uses partial reality rules. Explanations will be given if asked, too long to put it here.
-Automatic Bonus Progression rules apply.
-Background skill rules are applied.

Character creation:
-20 point buy.
-Non-core races with 8 or less RP receive a racial Feat as a bonus Feat.
-Races with 20 or more RP will only be allowed on a case-by-case basis after a thorough review and with LA applied as seen fitting for the race in question. Wyrwoods enjoy a blanket ban.
-Monster-as-PC’s rules are allowed. One of the base creature’s feats can be swapped out to another appropriate one.

Psionic rules:
-Psionic is treated as a type of magic similarly to arcane or divine. For any effect pertaining to magic in general, psionics are counted as magic. Spells such as detect psionics, antipsionic field, and similar are replaced with, respectively, detect magic, antimagic field, and similar. PR is treated as the same quality as SR in all situations. All in all, for effects that divide magic by types (arcane/divine/psionic, e.g. this includes Use Magic Device) they're treated as a different thing, while for effects that specify magic or psionics as if they were a different thing, they're considered to be one and the same. I reserve the right to make the ruling on which clause applies in cases where the wording is ambiguous.
-As a conclusion from the above, knowledge (psionics) is a thing, equivalent to knowledge (arcana) or knowledge (religion) for its respective field.
-Psionic crafting feats are rolled into magic crafting feats.
-To gain ranks in the autohypnosis skill (yes, I'd allow it after some thought), at least half your total character levels have to be in a class capable of manifesting psionic powers. Levels in a prestige class that advance your manifesting ability count as levels in that class.
-Psychic spellcasting (occult classes) is treated as if it's the same thing as psionics for all intents and purposes (this includes the ability to gain ranks in the autohypnosis skill) other than qualifying for feats or classes, unless specified otherwise in a particular case. No psychic duels since they're bullshit.
-Psychic (occult) characters will be heavily reviewed and altered as seen fitting so as to prevent abusing mechanics which aren't compatible with non-psychic classes.
-Psionic races are not allowed, period. Their FCB's might be allowed for Paizo races at my discretion.
-Psionic traits are allowed in general, but the DM reserves the right to not allow particular ones.
-Psionic display customisation guidelines are encouraged for anyone playing as a manifester, since it's cool stuff.
-For purpose of bonuses on any equipment (weapons and armor explicitly included), magic and psionics are the same thing, no exceptions. If you add a +1 equivalent magical power and a +1 equivalent psionic power to a +1 base weapon, it all stacks as a +3 weapon. Yes, this means psionic equipment enhancements are generally allowed.
-Psychic reformation is a banned spell.
-Instead of “specially-treated crystals similar to cognizance crystals”, always assume either diamonds or diamond dust, depending on which of the two is used in the closest arcane or divine equivalent.